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WEEKLY MINERAL & GEM AUCTIONS !

Welcome to our mineral auction website. Thousands of mineral specimens sold - including fluorite, rhodochrosite and many other rocks and minerals. Please read the bidding rules and regulations before bidding. Enjoy!

If you're new to the site, you can register here.


Over 60,000 fine minerals, crystals and gemstones sold since 2002!
New mineral auctions are posted each week.


Welcome to the largest and most diverse single-source site for fine minerals and mineral specimens at auction. This is an inventory LIQUIDATION venue adjunct to our gallery site

The Arkenstone, www.iRocks.com

If you're looking for a specific mineral, locality, or price point, visit www.iRocks.com and browse our extensive selection of fine minerals, crystals, and gemstones for sale.

 

 

Closed Auctions

FINE MINERAL COLLECTION and INVENTORY LIQUIDATION AUCTION (set 2 of 2) - FEATURING SPECIMENS FROM THE KAY ROBERTSON COLLECTION - end Thursday July 19th, 2018

Ends Thursday, July 19th, 2018
at 6:45 PM (Central Time Zone)


We have a great selection of material that we picked up over the last few months along with rarities, unusual pieces, gem crystals, classics and display specimens. Look for new goodies from Tucson along with new collection acquisitions to appear in the coming weeks. You'll even find a few fossils, carvings / lapidary items and gemstones mixed in every now and then. We'll still have selections from various collections we've obtained including Willard Wulff, Francesco Bedogne, Rolando Gioia, Charlie Key and plenty of pieces from Kay Robertson along with various dealers' inventories. Look here for the not so typical mineral specimens along with plenty of your favorites. We don't just offer the "standard 20 species", but an eclectic mix of specimens that appeal to everybody! Enjoy!

Some of the highlights from this week’s auction include:

1. Wonderful, historic, GEMMY multi-crystal group of AQUAMARINE from Brazil (ex Fred Pough Collection!!)
2. Fine quality, rich green colored, gemmy DEMANTOID GARNET crystals on matrix from Madagascar (ex Francesco Bedogné Collection)
3. Excellent LARGE CABINET display specimen of NATIVE COPPER with CUPRITE and MALACHITE from Bolivia
4. Attractive, uniquely etched purple cubic FLUORITE crystal group from the Elmwood Mine, Tennessee
5. Superb cyclic twinned CASSITERITE from Bolivia with a GEM QUALITY crystal!
6. Beautiful classic WULFENITE crystals on CALCITE from Tsumeb
7. Rare electric blue LINARITE on matrix from Mammoth-Saint Anthony, Tiger, Arizona!
8. Page 2 features assorted worldwide minerals (focusing on European localities) from the Kay Robertson Collection

$25 and $10 RESERVE GEMSTONE AUCTION - Ends July 19th, 2018

Ends July 19th, 2018 at 7:00 PM (Central Time)

Here we have one of our popular combined auction of mixed gems of varying reserve prices
($25 and $10 respectively this week)
Unique and attractive items as always - check them out !!
Questions about Gems?: CONTACT Gem admin Brian Kosnar: click here

MINERAL COLLECTION LIQUIDATION AUCTIONS (set 1 of 2) with OLD CLASSICS, NEW FINDS and RARITIES - ends Thursday July 19, 2018

ends Thursday July 19, 2018
at 6:30 PM (Central Time Zone)

A great mix this week featuring gem crystals from a Tourmaline collection plus old classics, contemporary beauties and rare species! We are continuing to process material from the wonderful old mineral collections of Kay Robertson along with fine minerals from numerous other collections and purchases including 1980s-90s specimens from the Ted Bartels Collection. Lots of old classics here that are hard to find at any price, let alone at auction!


Some of the highlights from this week’s include:

1. NEW Erongo AQUAMARINE FIND
2. Specimens from the KEN ROBERTS & ROSS LILLIE collections
including a rare and fine SPESSARTINE GARNET
3. Large Michigan COPPER, Cobalt SILVER ore slab 4. Selection of fine RADIOACTIVE species
5. Kay Robertson Collection rarities and classics
6. Rare gem Austrian SPHENE thumbnail
7. Chinese QUARTZ "prase"

SPECIAL ROUGH and CUT (GEM and CRYSTAL SETS) AUCTION - Ends July 17, 2018

Ends Tuesday, July 17th, 2018 at 7:15 PM (Central Time Zone)

We rarely offer rough and cuts, but we have a real treat this week. We have 21 sets of rough and cut gems and minerals from various worldwide localities. Plenty of your favorites including: Tanzanite, Spessartine, Kyanite and Euclase along with lots less common items like Cuprite, Wulfenite, Anhydrite and Pollucite, and hard to find rarities including, Catapleiite, Pyrargyrite, Rinkite and Preobrazhenskite!

Some sets are valued in the THOUSANDS of dollars, so be sure to check out everything. Don’t miss out on these beauties; there are some really attractive and worthwhile sets in the mix, all with $10 RESERVE STARTING BIDS.

FINE MINERAL COLLECTION and INVENTORY LIQUIDATION AUCTION (set 2 of 2) - FEATURING SPECIMENS FROM THE KAY ROBERTSON COLLECTION - end Thursday July 12th, 2018

Ends Thursday, July 12th, 2018
at 6:45 PM (Central Time Zone)


We have a great selection of material that we picked up over the last few months along with rarities, unusual pieces, gem crystals, classics and display specimens. Look for new goodies from Tucson along with new collection acquisitions to appear in the coming weeks. You'll even find a few fossils, carvings / lapidary items and gemstones mixed in every now and then. We'll still have selections from various collections we've obtained including Willard Wulff, Francesco Bedogne, Rolando Gioia, Charlie Key and plenty of pieces from Kay Robertson along with various dealers' inventories. Look here for the not so typical mineral specimens along with plenty of your favorites. We don't just offer the "standard 20 species", but an eclectic mix of specimens that appeal to everybody! Enjoy!

Some of the highlights from this week’s auction include:

1. Big lilac FLUORITE cubes with SPHALERITE from the Elmwood Mine, Tennessee
2. A lovely crystallized LEAF GOLD specimen from the Eagle's Nest Mine in California
3. Glowing orange color, thick, tabular WULFENITE on matrix from Mexico
4. Cabinet sized, metallic, silvery STIBNITE crystal from China
5. Wonderful GEMMY TOPAZ crystal weighing 86.62 grams from China
6. Beautiful multi-colored PRECIOUS OPAL on matrix from Queensland, Australia
7. Gorgeous, gemmy, multicolor "phantom" FLUORITE on QUARTZ from Spain
8. Attractive WATERMELON TOURMALINE crystal group from Brazil (ex Rolando Gioia Collection)
9. Page 2 features assorted worldwide minerals (focusing on European localities) from the Kay Robertson Collection

SPECIAL $100 and $50 RESERVE GEMSTONE AUCTION - Ends July 12th, 2018

Ends Thursday, July 12th, 2018 at 7:00 PM (Central Time Zone)

ATTENTION! We are pleased to announce that we have purchased a notable collection / supply from a retiring gem dealer of beautiful mixed stones, cabochons and jewelry which we will be offering at liquidation prices!!

Keep watching every week for a great mix and new variety of good quality gemstones to appear over the following months. Reserve prices will typically be $100 and $50 on the better material every other week, with $25 and $10 reserves on alternating weeks.
Questions about Gems?: CONTACT Gem admin Brian Kosnar: click here

MINERAL COLLECTION LIQUIDATION AUCTIONS (set 1 of 2) with OLD CLASSICS, NEW FINDS and RARITIES - ends Thursday July 12, 2018

ends Thursday July 12, 2018
at 6:30 PM (Central Time Zone)

A wonderful selection of specimens in this week's auctions with a mix of gem crystals, classics, contemporary beauties and rare species ! We are continuing to process material from the wonderful old mineral collections of Kay Robertson along with fine minerals from numerous other collections and purchases including 1980s-90s specimens from the Ted Bartels Collection. Lots of old classics here that are hard to find at any price, let alone at auction! .


Some of the highlights from this week’s include:

1 Superb gem TOPAZ from the Steve Smale Collection
2. Beautiful old SILVER wires from Cobalt
3. Fine selection of LARGER specimens
4. Old CROCOITE from the Jaye Smith Collection
5. Unusual old style Los Lamentos WULFENITE
6. ORBICULAR JASPER from California
7. Fine selection of gem TOURMALINES including Jonas and Pederneira mine pieces
8. Rare Swiss TWISTED QUARTZ with a faden
9. Old fine FLUORITE from Japan

$25 and $10 RESERVE GEMSTONE AUCTION - Ends July 5th, 2018

Ends July 5th, 2018 at 7:00 PM (Central Time)

Here we have one of our popular combined auction of mixed gems of varying reserve prices
($25 and $10 respectively this week)
Unique and attractive items as always - check them out !!
Questions about Gems?: CONTACT Gem admin Brian Kosnar: click here

FINE MINERAL COLLECTION and INVENTORY LIQUIDATION AUCTION (set 2 of 2) - FEATURING SPECIMENS FROM THE KAY ROBERTSON COLLECTION - end Thursday July 5th, 2018

Ends Thursday, July 5th, 2018
at 6:45 PM (Central Time Zone)


We have a great selection of material that we picked up over the last few months along with rarities, unusual pieces, gem crystals, classics and display specimens. Look for new goodies from Tucson along with new collection acquisitions to appear in the coming weeks. You'll even find a few fossils, carvings / lapidary items and gemstones mixed in every now and then. We'll still have selections from various collections we've obtained including Willard Wulff, Francesco Bedogne, Rolando Gioia, Charlie Key and plenty of pieces from Kay Robertson along with various dealers' inventories. Look here for the not so typical mineral specimens along with plenty of your favorites. We don't just offer the "standard 20 species", but an eclectic mix of specimens that appeal to everybody! Enjoy!

Some of the highlights from this week’s auction include:

1. A beautiful, rare, near cabinet sized piece of COPAL / YOUNG AMBER with INSECT INCLUSIONS from Colombia!
2. Fantastic, rare, gorgeous blue-green "butterfly"-twinned PHOSPHOPHYLLITE crystals on matrix from Bolivia
3. Wonderful pink colored MANGANOAN CALCITE crystals on matrix from Morocco
4. Excellent matrix specimen of fine quality CARROLLITE on CALCITE from D. R. Congo
5. An interesting and unique etched blue TOPAZ crystal from Brazil (ex Rolando Gioia Collection)
6. Rarities include a green-blue LISKEARDITE from Cornwall and a EUCHROITE from the type locality!
7. GEM QUALITY / WATER CLEAR SMOKY QUARTZ crystal from Switzerland
8. Rare BLUE HEMIMORPHITE on matrix from Kimbedi, Rep. Congo (Brazzaville)
9. Page 2 features assorted minerals from the Kay Robertson collection

MINERAL COLLECTION LIQUIDATION AUCTIONS (set 1 of 2) with OLD CLASSICS, NEW FINDS and RARITIES - ends Thursday July 5, 2018

ends Thursday July 5, 2018
at 6:30 PM (Central Time Zone)

A great mix this week featuring gem crystals from a Tourmaline collection plus old classics, contemporary beauties and rare species ! We are continuing to process material from the wonderful old mineral collections of Kay Robertson along with fine minerals from numerous other collections and purchases including 1980s-90s specimens from the Ted Bartels Collection. Lots of old classics here that are hard to find at any price, let alone at auction! .


Some of the highlights from this week’s include:

1. Fine selection of LARGER specimens
2. NEW FINDS of Erongo AQUAMARINE and RARE blue Peru SALAMMONIAC
3. Classic old FLUORITE from the Heights Mine
4. Rare Butte WURTZITE and rare old Russian RUBELLITE
5. Fine old VANADINITE & CALCITE from Mexico
6. Excellent Chinese CALCITE
7. Unique "Pseudocubic" SMOKY QUARTZ from the Himalaya Mine
8. OLD EUROPEAN rarities form the 1800s and early 1900s from Kay Robertson's treasure trove!

SPECIAL MINERAL AUCTION - $499 RESERVE LIQUIDATION SPECIMENS - ends * TUESDAY * July 3, 2018

Ends TUESDAY July 3, 2018
at 7:00 PM (Central Time Zone)

PLEASE NOTE: Due to a mistake in the listing, we had to delete this auction and re-post it with the correct $499 reserve starting bids. We sincerely apologize for the inconvenience. The auction will still close on the listed date and time.

Continuing with our special themed auctions through the summer we've put together a selection of higher-end specimens all starting with $499 reserve bids. Every piece in this auction is valued at over $1,000 in the inventory (some are valued at $2,000+). There are plenty of classic and contemporary, fine quality, attractive miniature and cabinet display pieces from around the world. A handful of the specimens come with FREE custom lucite display bases as well.

PLEASE NOTE: Due to the larger size and weight of some of the pieces in this auction (their bases included), there will be additional shipping charges. Please keep this in mind when bidding. If you have any questions, please ask before placing your bids. Thank you!

Lastly, This auction closes on a TUESDAY night, not our normal Thursday schedule, and we'll send out a reminder / announcement before it closes to you don't miss out.

SPECIAL $100 and $50 RESERVE GEMSTONE AUCTION - Ends June 28th, 2018

Ends Thursday, June 28th, 2018 at 7:00 PM (Central Time Zone)

ATTENTION! We are pleased to announce that we have purchased a notable collection / supply from a retiring gem dealer of beautiful mixed stones, cabochons and jewelry which we will be offering at liquidation prices!!

Keep watching every week for a great mix and new variety of good quality gemstones to appear over the following months. Reserve prices will typically be $100 and $50 on the better material every other week, with $25 and $10 reserves on alternating weeks.
Questions about Gems?: CONTACT Gem admin Brian Kosnar: click here

FINE MINERAL COLLECTION and INVENTORY LIQUIDATION AUCTION (set 2 of 2) - FEATURING SPECIMENS FROM THE KAY ROBERTSON COLLECTION - end Thursday June 28th, 2018

Ends Thursday, June 28th, 2018
at 6:45 PM (Central Time Zone)


We have a great selection of material that we picked up over the last few months along with rarities, unusual pieces, gem crystals, classics and display specimens. Look for new goodies from Tucson along with new collection acquisitions to appear in the coming weeks. You'll even find a few fossils, carvings / lapidary items and gemstones mixed in every now and then. We'll still have selections from various collections we've obtained including Willard Wulff, Francesco Bedogne, Rolando Gioia, Charlie Key and plenty of pieces from Kay Robertson along with various dealers' inventories. Look here for the not so typical mineral specimens along with plenty of your favorites. We don't just offer the "standard 20 species", but an eclectic mix of specimens that appeal to everybody! Enjoy!

Some of the highlights from this week’s auction include:

1. Beautiful cherry red RHODOCHROSITE crystals with QUARTZ and SULFIDES from the Sweet Home Mine
2.
3. Classic Trapiche Habit EMERALD from Colombia
4. Rarely seen reverse pseudomorph of QUARTZ replacing TOURMALINE from Brazil
5. Gemmy, rarely seen PURPLE COLORED BARITE from Flagstaff Mountain, Washington
6. Attractive GEM QUALITY doubly-terminated QUARTZ on BI-COLORED TOURMALINE from Brazil
7. A large single PYRITE pyritohedron from the Spruce Claim, King County, Washington
8. Rarities include MENDIPITE, SPANGOLITE and PYROXMANGITE
9. Page 2 features assorted minerals from the Kay Robertson collection

MINERAL COLLECTION LIQUIDATION AUCTIONS (set 1 of 2) with OLD CLASSICS, NEW FINDS and RARITIES - ends Thursday June 28, 2018

ends Thursday June 28, 2018
at 6:30 PM (Central Time Zone)

A great mix this week featuring gem crystals from a Tourmaline collection plus old classics, contemporary beauties and rare species ! We are continuing to process material from the wonderful old mineral collections of Kay Robertson along with fine minerals from numerous other collections and purchases including 1980s-90s specimens from the Ted Bartels Collection. Lots of old classics here that are hard to find at any price, let alone at auction! .


Some of the highlights from this week’s include:

1. Selection of fine and rare TOURMALINES
2. Large , important, doubly-terminated CARROLLITE
3. ROSE QUARTZ from the famous 1959 Brazil find
4. HYDROXLYHERDERITE from Maine
5. Fine Broken Hill (Kabwe) HOPEITE
6. Excellent selection of old and unusual QUARTZ specimens
7. RARE old CALIFORNIA AMETHYST

$25 and $10 RESERVE GEMSTONE AUCTION - Ends June 21st, 2018

Ends June 21st, 2018 at 7:00 PM (Central Time)

Here we have one of our popular combined auction of mixed gems of varying reserve prices
($25 and $10 respectively this week)
Unique and attractive items as always - check them out !!
Questions about Gems?: CONTACT Gem admin Brian Kosnar: click here

FINE MINERAL COLLECTION and INVENTORY LIQUIDATION AUCTION (set 2 of 2) - FEATURING SPECIMENS FROM THE KAY ROBERTSON COLLECTION - end Thursday June 21st, 2018

Ends Thursday, June 21st, 2018
at 6:45 PM (Central Time Zone)


We have a great selection of material that we picked up over the last few months along with rarities, unusual pieces, gem crystals, classics and display specimens. Look for new goodies from Tucson along with new collection acquisitions to appear in the coming weeks. You'll even find a few fossils, carvings / lapidary items and gemstones mixed in every now and then. We'll still have selections from various collections we've obtained including Willard Wulff, Francesco Bedogne, Rolando Gioia, Charlie Key and plenty of pieces from Kay Robertson along with various dealers' inventories. Look here for the not so typical mineral specimens along with plenty of your favorites. We don't just offer the "standard 20 species", but an eclectic mix of specimens that appeal to everybody! Enjoy!

Some of the highlights from this week’s auction include:

1. A $6,000, fantastic, gemmy, doubly-terminated, blue AQUAMARINE crystals on Albite form Pakistan (ex Obodda)
2. GEM quality, golden rhombic CALCITE specimen from the Sokolovskoe Iron Mine, in Kazakhstan
3. A classic specimen of OPAL pseudomorphing after FOSSIL CLAM shell from Coober Pedy, Australia
4. Classic, rarely seen DOUBLY-TERMINATED twinned red CINNABAR with QUARTZ from China
5. GEM PURPLE TOPAZ on MAGNESITE from Brumado, Bahia, Brazil
6. Attractive color change "butterfly-twinned" MONAZITE-(Ce) crystals on QUARTZ from the Siglo XX Mine, Bolivia
7. A big, rare, historic specimen of SYNTHETIC QUARTZ (ex Motorola Laboratories)
8. An incredibly rare specimen of TETRADYMITE from the nearly 200 year old type locality in Slovakia!
9. Page 2 features assorted minerals from the Kay Robertson collection

FINE MINERAL COLLECTION LIQUIDATION AUCTIONS (set 1 of 2) with OLD CLASSICS, NEW FINDS and RARITIES - ends Thursday June 21, 2018

ends Thursday June 21, 2018
at 6:30 PM (Central Time Zone)

A great mix this week featuring gem crystals like Tourmaline along with LOTS of old classics, contemporary beauties and rare species ! We are continuing to process material from the wonderful old mineral collections of Kay Robertson along with fine minerals from numerous other collections and purchases including 1980s-90s specimens from the Ted Bartels Collection. Lots of old classics here that are hard to find at any price, let alone at auction. .


Some of the highlights from this week’s include:

1. Rare Tajikistan TOURMALINE
2. Superb old and rare Bisbee AZURITE & MALACHITE
3. Fine crystallized GOLD
4. Selection of COLORADO specimens including a rare Cripple Creek CALAVERITE, GOLD & DOLOMITE
5. Large STILBITE, HEULANDITE & QUARTZ pocket
6. Rare Tsumeb MIMETITE after CERUSSITE
7. Selection of TOURMALINES
8. Rare NEBRASKA BARITE & CALCITE in a BRACHIOPOD

SPECIAL MINERAL AUCTION - THE COLLECTION of THOMAS CAMPBELL - ends TUESDAY June 19th, 2018

Ends TUESDAY June 19th, 2018
at 7:00 PM (Central Time Zone)

Continuing with our special themed auctions through the summer we are thrilled for our next installment of the worldwide collection of Tom Campbell.

Tom is a mineralogist and mineral collector who works with us here at The Arkenstone. He has over 35 years' worth of experience in the fields of exploration geology, mining, and applied mineralogy, but he has even more years under his belt as a collector. He's been passionate about minerals and mineralogy his entire life, and has assembled a wonderful worldwide collection. In addition to collecting, Tom discovered the species Tiptopite, Fransoletite and Pahasapaite along with co-describing eight more new species. Take a look at this week's sampling of these attractive display specimens from culling Tom's collection.

SPECIAL $100 and $50 RESERVE GEMSTONE AUCTION - Ends June 14th, 2018

Ends Thursday, June 14th, 2018 at 7:00 PM (Central Time Zone)

ATTENTION! We are pleased to announce that we have purchased a notable collection / supply from a retiring gem dealer of beautiful mixed stones, cabochons and jewelry which we will be offering at liquidation prices!!

Keep watching every week for a great mix and new variety of good quality gemstones to appear over the following months. Reserve prices will typically be $100 and $50 on the better material every other week, with $25 and $10 reserves on alternating weeks.
Questions about Gems?: CONTACT Gem admin Brian Kosnar: click here

FINE MINERAL COLLECTION and INVENTORY LIQUIDATION AUCTION (set 2 of 2) - FEATURING SPECIMENS FROM THE KAY ROBERTSON COLLECTION - end Thursday June 14th, 2018

Ends Thursday, June 14th, 2018
at 6:45 PM (Central Time Zone)


We have a great selection of material that we picked up over the last few months along with rarities, unusual pieces, gem crystals, classics and display specimens. Look for new goodies from Tucson along with new collection acquisitions to appear in the coming weeks. You'll even find a few fossils, carvings / lapidary items and gemstones mixed in every now and then. We'll still have selections from various collections we've obtained including Willard Wulff, Francesco Bedogne, Rolando Gioia, Charlie Key and plenty of pieces from Kay Robertson along with various dealers' inventories. Look here for the not so typical mineral specimens along with plenty of your favorites. We don't just offer the "standard 20 species", but an eclectic mix of specimens that appeal to everybody! Enjoy!

Some of the highlights from this week’s auction include:

1. One of the new specimens of PURPLE QUARTZ ("Grape" Chalcedony / Agate) from Indonesia
2. A rarely seen specimen of TRANSLUCENT / GEMMY AMAZONITE on Smoky Quartz from Afghanistan
3. Excellent crystallized ROSE QUARTZ on QUARTZ from Brazil
4. A 3-piece set of WIRE SILVERS from the Hongda Mine in China
5. Gorgeous, gemmy, rich red colored metallic CUPRITE on matrix from the Milpillas Mine, Mexico
6. A lovely doubly-terminated, rich blue colored AQUAMARINE crystal from Erongo, Namibia
7. GEMMY VILLIAUMITE crystal from Mont Saint-Hilaire, Canada
8. Rarities include LEONITE with HALITE; CHAMOSITE ("Thuringite") after ALMANDINE; UMANGITE with CHALCOMENITE; and CREASEYITE
9. Page 2 features assorted minerals from the Kay Robertson collection

FINE MINERAL COLLECTION LIQUIDATION AUCTIONS (set 1 of 2) with OLD CLASSICS, NEW FINDS and RARITIES - ends Thursday June 14, 2018

ends Thursday June 14, 2018
at 6:30 PM (Central Time Zone)

A great mix this week featuring gem crystals like Topaz and Tourmaline along with LOTS of old classics, contemporary beauties and rare species ! We are continuing to process material from the wonderful old mineral collections of Kay Robertson along with fine minerals from numerous other collections and purchases. Lots of old classics here that are hard to find at any price, let alone at auction.


Some of the highlights from this week’s include:

1. Large TOURMALINE combination from the Steve Smale Collection
2. Fine, large South Carolina AMETHYST and excellent Michigan COPPER
3. VERY FINE, bi-colored TANZANITE thumbnail
4. Rare old Romanian AMETHYST, and AMETHYST from the Charlie Key Collection
5. CARROLLITE on matrix
6. Rare TOURMALINE from the Little Three Mine

SPECIAL $50 RESERVE GEMSTONE AUCTION - Ends June 7th, 2018

Ends Thursday, June 7th, 2018 at 7:00 PM (Central Time Zone)

ATTENTION! We are pleased to announce that we have purchased a notable collection / supply from a retiring gem dealer of beautiful mixed stones, cabochons and jewelry which we will be offering at liquidation prices!!

Keep watching every week for a great mix and new variety of good quality gemstones to appear over the following months. Reserve prices this wekk are $50.
Questions about Gems?: CONTACT Gem admin Brian Kosnar: click here

FINE MINERAL COLLECTION and INVENTORY LIQUIDATION AUCTION (set 2 of 2) - FEATURING SPECIMENS FROM THE KAY ROBERTSON COLLECTION - end Thursday June 7th, 2018

Ends Thursday, June 7th, 2018
at 6:45 PM (Central Time Zone)


We have a great selection of material that we picked up over the last few months along with rarities, unusual pieces, gem crystals, classics and display specimens. Look for new goodies from Tucson along with new collection acquisitions to appear in the coming weeks. You'll even find a few fossils, carvings / lapidary items and gemstones mixed in every now and then. We'll still have selections from various collections we've obtained including Willard Wulff, John Arnaud, Rolando Gioia, Charlie Key and plenty of pieces from Kay Robertson along with various dealers' inventories. Look here for the not so typical mineral specimens along with plenty of your favorites. We don't just offer the "standard 20 species", but an eclectic mix of specimens that appeal to everybody! Enjoy!

Some of the highlights from this week’s auction include:

1. Newly mined "COCONUT" ANDRADITE GARNET from Peru
2. Large "Baveno" twinned MICROCLINE crystal with SCHORL from Pakistan
3. Excellent rare crystallized ANDERSONITE from Ambrosia Lake, New Mexico
4. Beautiful pinkish-red RHODOCHROSITE from the Moose Mine, Colorado
5. Rare specimen of crystallized NADORITE from the Type Locality in Algeria
6. Attractive crystallized GOLD specimen from the Piolho Claim, Brazil
7. Very sharp and lustrous blue SAPPHIRE crystal from the Zazafotsy Quarry, Madagascar
8. Superbly well-crystallized GOETHITE specimen from Colorado
9. Page 2 features assorted minerals from the Kay Robertson collection

FINE MINERAL COLLECTION LIQUIDATION AUCTIONS (set 1 of 2) with OLD CLASSICS, NEW FINDS and RARITIES - ends Thursday June 7, 2018

ends Thursday June 7, 2018
at 6:30 PM (Central Time Zone)

A great mix this week featuring gem crystals like Topaz and Tourmaline along with LOTS of old classics, contemporary beauties and rare species ! We are continuing to process material from the wonderful old mineral collections of Kay Robertson along with William Logan, Raul Sanabria, Joe Lobell and others. Lots of old classics here that are hard to find at any price, let alone at auction.


Some of the highlights from this week’s include:

1. Large Russian TOURMALINE
2. FLUORITE & TOPAZ from California
3. Superb PENTAGONITE
4. Classic old Tri-State SPHALERITE & CHALCOPYRITE
5. Gem CUPRITE from Australia
6. Rare old German ANGLESITE & CERUSSITE from the Friedrichssegen Mine
7. RHODOCHROSITES from the W.S. Logan Collection
8. Classics and rarities from the Kay Robertson, Joe Lobell and an East Coast collection
9. Fine CALCITE, BARITE & FLUORITE from the Cumberland Mine
10. Selection of TOURMALINES
11. Old (1770s!) German GALENA

SPECIAL MINERAL AUCTION - THE COLLECTION of FRANCESCO BEDOGNÉ - ends TUESDAY June 5th, 2018

Ends TUESDAY June 5th, 2018
at 7:00 PM (Central Time Zone)

Continuing with our special themed auctions through the summer we are thrilled for our next installment of the worldwide collection of Francesco Bedogné of Sondrio, Italy (1942-2012).

Dr. Bedogné was a beloved, well-known mineral collector, field collector and author. He specialized in collecting and writing about minerals of the Italian Alps, contributing dozens of articles and many books including the minerals of famous Alpine deposits such as Val Chiavenna, Val Bregaglia, Val Masino, Val Codera and of course the famous Val Malenco for which he was best known (see the Mineralogical Record article in Vol. 3, No. 3 : May / June 1972; pg. 120-123). Bedogné was the founder of the Valtellinese Mineralogical Institute as well. A book featuring some of his finest specimens entitled "Segrete Geometrie" was published in 2015, and is available for purchase from us here at The Arkenstone.

Bedogné's worldwide collection features many attractive historic, classic and contemporary specimens, and we've taken this opportunity showcase some great pieces from this collection. Look for more of Francesco's specimens later on this year.

SPECIAL HIGH-$$$ MINERAL AUCTION - FEATURING SELECTED PREMIUM SPECIMENS FROM OUR GALLERY AND OLD COLLECTIONS - ends Thursday May 31, 2018

Ends Thursday, May 31, 2018
at 7:15 PM (Central Time Zone)

For the next few months, we're going to be listing special themed auctions featuring specimens from a specific locality, or a special theme, or from a particular collection, etc. We're going to do a few special auctions per month during the summer! The current theme auction features superb specimens all worth much in excess of $1000, starting at $899 liquidation bids. Enjoy!

PLEASE NOTE: This auction closes on Thursday like the regular auctions, but just a little later than normal. We'll send out a reminder / announcement before it closes to you don't miss out.

SPECIAL $100 and $50 RESERVE GEMSTONE AUCTION - Ends May 31st, 2018

Ends Thursday, May 31st, 2018 at 7:00 PM (Central Time Zone)

ATTENTION! We are pleased to announce that we have purchased a notable collection / supply from a retiring gem dealer of beautiful mixed stones, cabochons and jewelry which we will be offering at liquidation prices!!

Keep watching every week for a great mix and new variety of good quality gemstones to appear over the following months. Reserve prices will typically be $100 and $50 on the better material every other week, with $25 and $10 reserves on alternating weeks.
Questions about Gems?: CONTACT Gem admin Brian Kosnar: click here

FINE MINERAL COLLECTION and INVENTORY LIQUIDATION AUCTION (set 2 of 2) - FEATURING SPECIMENS FROM THE KAY ROBERTSON COLLECTION - end Thursday May 31st, 2018

Ends Thursday, May 31st, 2018
at 6:45 PM (Central Time Zone)


We have a great selection of material that we picked up over the last few months along with rarities, unusual pieces, gem crystals, classics and display specimens. Look for new goodies from Tucson along with new collection acquisitions to appear in the coming weeks. You'll even find a few fossils, carvings / lapidary items and gemstones mixed in every now and then. We'll still have selections from various collections we've obtained including Willard Wulff, Paul Zerfass, Rolando Gioia, Charlie Key and plenty of pieces from Kay Robertson along with various dealers' inventories. Look here for the not so typical mineral specimens along with plenty of your favorites. We don't just offer the "standard 20 species", but an eclectic mix of specimens that appeal to everybody! Enjoy!

Some of the highlights from this week’s auction include:

1. EXCELLENT $$ matrix specimen of gemmy blue-green TOURMALINE on QUARTZ from Afghanistan
2. Classic "snowflake" CERUSSITE on SMITHSONITE from Tsumeb
3. GEM quality colorless TOPAZ crystal from China
4. Newly discovered orange CALCITE from the Grabiszyce Quarry, Poland
5. Fine quality beautiful blue rare CORNETITE specimen with Malachite and Chrysocolla from D. R. Congo
6. Newly discovered green twinned CHRYSOBERYL from Brazil
7. Large "floater" piece of gemmy yellow LIBYAN DESERT GLASS
8. Polished specimen of NATIVE SILVER with RHODOCHROSITE from Peru
9. Page 2 features assorted minerals from the Kay Robertson collection

MINERAL COLLECTION LIQUIDATION AUCTIONS (set 1 of 2) - ends Thursday May 31, 2018

FINE MINERAL SPECIMEN AUCTIONS (set 1 of 2) - FEATURING OLD CLASSICS AND NEW FINDS FROM MULTIPLE OLD COLLECTIONS! - end Thursday May 31, 2018 ends Thursday May 31, 2018
at 6:30 PM (Central Time Zone)

A great mix this week featuring old classics, contemporary beauties, gem crystals and rare species ! We are continuing to process material from the wonderful old mineral collections of Bedogne, Robertson, Obodda, and others. Lots of old classics here that are hard to find at any price, let alone at auction.


Some of the highlights from this week’s include:

1. RARE TANZANITE on GYPSUM
2. Old rare PAKISTAN FLUORITE and a fine MICHIGAN COPPER
3. Many rarities and classics from the Kay Robertson, Joe Lobell and an East Coast collection
4. Large DANBURITE
5. Rare QUARTZ prases with HEMATITE iron roses from Germany
6. Selection of TOURMALINES
7. Rich large LINARITE from Blanchard

SPECIAL MINERAL AUCTION - FEATURING SELECTED SPECIMENS FROM THE COLLECTIONS of DR. STEPHEN SMALE and CHARLIE KEY - ends Thursday May 24th, 2018

Ends Thursday, May 24th, 2018
at 7:15 PM (Central Time Zone)

For the next few months, we're going to be listing special themed auctions featuring specimens from a specific locality, or a special theme, or from a particular collection, etc. We're going to do a few special auctions per month during the summer! The current theme auction features 40 specimens; 20 of which are from the collection of noted mathematician and mineral collector, Dr. Stephen Smale, and another 20 pieces from the collection of the renowned mineral dealer Charles Locke Key. All of the Smale specimens are culled from his world-famous collection of Chinese minerals, and the Key specimens represent worldwide localities.

PLEASE NOTE: This auction closes on Thursday like the regular auctions, but just a little later than normal. We'll send out a reminder / announcement before it closes to you don't miss out.

$25 and $10 RESERVE GEMSTONE AUCTION - Ends May 24th, 2018

Ends May 24th, 2018 at 7:00 PM (Central Time)

Here we have one of our popular combined auction of mixed gems of varying reserve prices
($25 and $10 respectively this week)
Unique and attractive items as always - check them out !!
Questions about Gems?: CONTACT Gem admin Brian Kosnar: click here

FINE MINERAL COLLECTION and INVENTORY LIQUIDATION AUCTION (set 2 of 2) - FEATURING SPECIMENS FROM THE KAY ROBERTSON COLLECTION - end Thursday May 24th, 2018

Ends Thursday, May 24th, 2018
at 6:45 PM (Central Time Zone)


We have a great selection of material that we picked up over the last few months along with rarities, unusual pieces, gem crystals, classics and display specimens. Look for new goodies from Tucson along with new collection acquisitions to appear in the coming weeks. You'll even find a few fossils, carvings / lapidary items and gemstones mixed in every now and then. We'll still have selections from various collections we've obtained including Willard Wulff, Rolando Gioia, Charlie Key and plenty of pieces from Kay Robertson along with various dealers' inventories. Look here for the not so typical mineral specimens along with plenty of your favorites. We don't just offer the "standard 20 species", but an eclectic mix of specimens that appeal to everybody! Enjoy!

Some of the highlights from this week’s auction include:

1. Rarely seen associations of CUPRITE replaced by MALACHITE on AZURITE from TSUMEB!
2. Crystallized GOLD specimen with minor QUARTZ from Leadville, Colorado
3. Large, classic, sharp, lustrous GEM quality TOPAZ crystal from Klein Spitzkopje, Namibia (89 grams)
4. Highly sought after, classic STRIPED AMAZONITE with SMOKY QUARTZ crystals from Colorado (ex Larry Conklin Specimen)
5. Beautiful pink TOURMALINE crystal on QUARTZ (UN-REPAIRED) from the Himalaya Mine, San Diego County, California
6. Gorgeous cinnamon colored GROSSULAR with green DIOPSIDE from the Jeffery Mine, Quebec, Canada
7. Old time German SPHALERITE and QUARTZ from the Washington A. Roebling Collection
8. Cool pseudomorph of FERBERITE after SCHEELITE from Rwanda!
9. Page 2 features assorted minerals from the Kay Robertson collection