PRE-DENVER MINERAL COLLECTION AUCTIONS (set 1 of 2) featuring OLD CLASSICS, GEM CRYSTALS and RARITIES - ends Thursday Aug 9, 2018

ends Thursday August 9, 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 cyclic-twinned CERUSSITE from Tsumeb
2. Large Erongo SCHORL w/ SMOKY QUARTZ from the Charlie Key Collection
3. Old large SULFUR & ARAGONITE
4. RHODOCHROSITES from the W.S. Logan Collection
5. Striking large New Mexico FLUORITE
6. NEW Erongo AQUAMARINE w/ FLUORITE FIND
7. Ken Roberts Collection specimens
8. Fine Swiss SMOKY QUARTZ gwindel
Filter By

Calcite over Malachite after Azurite (Robertson Coll.)
Globe, Globe-Miami District, Gila Co., Arizona
4.2 x 3.2 x 1.6 cm
Chrysocolla ps. After Gypsum (rare AZ) Robertson Coll.
Helvetia, Helvetia-Rosemont District, Santa Rita Mts, Pima Co., Arizona
3.2 x 0.7 x 0.5 cm
Rhodochrosite (Perkin & Robertson Coll.)
Potosi Mine, Santa Eulalia, Chihuahua, Mexico
1.4 x 1.2 x 0.8 cm
Pyrite on Calcite (Ted Bartels Coll.)
Chenzhou Prefecture, Hunan Province, China
9.0 x 7.6 x 4.0 cm
Pseudocubic Wulfenite & Mimetite (2008 find)
San Juan Poniente, Mina Ojuela, Mapimi, Durango, Mexico
5.4 x 3.4 x 1.7 cm
Smithsonite & Hemimorphite (Robertson Coll.)
79 Mine, Chilito, Hayden area, Gila Co., Arizona
5.3 x 4.1 x 3.7 cm
Gem Tanzanite Crystal (16.5 carats)
Merelani Hills, Manyara Region, Tanzania
2.0 x 1.2 x 1.0 cm
gemmy Sphalerite slab (Ken Roberts Coll.)
Las Manforas Mine (Aliva Mine), Camaleno, Cantabria, Spain
9.0 x 7.3 x 1.4 cm
Azurite (rare old locale) Robertson Coll.
Mount Isa Mines, Queensland, Australia
3.5 x 2.8 x 2.7 cm
Large Fluorite (superb New Mexico) Ted Bartels Coll.
Judith Lynn Claim (T & G Prospect), Pine Canyon deposit, Grant Co., New Mexico
12.2 x 8.3 x 5.3 cm
Fluorite (RARE blue California) Robertson Coll.
Felix Mine, Azusa, San Gabriel Mts, Los Angeles Co., California
5.8 x 4.2 x 2.3 cm
Very Large Sulfur & Aragonite (old classic!)
nr. Agrigento (Girgenti), Agrigento Province, Sicily, Italy
16.8 x 13.7 x 10.5 cm
Quartz w/ Siderite (rare combo) Robertson Coll.
nr. Cavradi gorge, Tujetsch, Grischun, Switzerland
5.4 x 3.6 x 2.0 cm
Euchroite & Langite (rare WA combo) Robertson Coll.
Monte Cristo Mine, Monte Cristo, Snohomish Co., Washington
10.8 x 7.4 x 2.0 cm
Fluorite (fluorescent) on Quartz (Robertson Coll.)
Berta quarry and mine, Sant Cugat del Valles-El Papiol, Barcelona, Catalonia, Spain
7.5 x 6.1 x 4.0 cm
Copper xls w/ Cuprite (old classic) ex. Private collection
Phoenix Mine, Phoenix, Keweenaw Co., Michigan
8.3 x 7.8 x 3.2 cm
Mineral Auctions