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Size + Measurements
SIZE DEFINITIONS
Generic Dimension
Maximum Dimension
(Inches)
Maximum Dimension
(Centimeters)
Thumbnail
1 1/4
3
Miniature
2
5.0
Small Cabinet
3 3/4
9.4
Cabinet
> 3 3/4
> 9.4
While Toenail is not an official "competition" size classification, sometimes thumbnail specimens are just a bit too big for competition rules, often referred to as "boxbusters." There is no standard size for toenails, but they overlap a thumbnail and a miniature.
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(following auction sets)
April 26th/29th (April 18th, 20th and 25th auction sets)
May 10th/13th (May 2nd and 9th auction sets)
May 24th/27th (May 16th and 23rd auction sets)
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Collection information is a new field started in 2023 and may not return results for items auctioned prior to January 2023. Please use the main search feature if this field isn't returning expected results.
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Live Auctions
Closed Auctions
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Newest to Oldest
Oldest to Newest
Spinel
Luc Yen, Yenbai Province, Vietnam
1.8 x 1.5 x 1.6 cm
View Details on Closed Item
Andradite (var: "Demantoid") (new find!)
Antetezambato, Ambanja, Madagascar
4.6 x 3.3 x 2.6 cm
View Details on Closed Item
Mottramite pseudomorph after Wulfenite with Calcite (ex Brian Kosnar Collection)
Tsumeb mine, Tsumeb, Otjikoto Region, Namibia
10.0 x 8.3 x 5.3 cm
View Details on Closed Item
Peridot
Soppat, Northwest Frontier Province, Pakistan
2.8 x 2.3 x 2.2 cm
View Details on Closed Item
Vesuvianite (cat's eye terminations)
Hashupa, Shigar Valley, Baltistan, Nortern Areas, Pakistan
1.7 x 0.7 x 0.6 cm
View Details on Closed Item
Aquamarine (ex Rich Kosnar Coll.)
Conselheiro Pena, Doce Valley, Minas Gerais, Brazil
2.6 x 1.8 x 1.6 cm
View Details on Closed Item
Phenakite (gem quality)
Mogok, Sagaing District, Mandalay Division, Burma (Myanmar)
2.0 x 0.3 x 0.3 cm
View Details on Closed Item
Indicolite Tourmaline
Pederneira claim, Sao Jose da Safira, Doce valley, Minas Gerais, Brazil
2.4 x 0.6 x 0.5 cm
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Sphalerite on Pyrite (ex Rich Kosnar Collection)
Pasco Province, Pasco Department, Peru
3.6 x 2.5 x 2.1 cm
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Prehnite (fantastic quality) (new find!)
Lower New Street, Paterson, Passaic County, New Jersey
4.3 x 3.6 x 1.4 cm
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Ring, Tourmaline in Sterlium Silver (designed and made by Brett Kosnar)
Brazil
4.47 ct (Tourmaline), Ring Size = 8
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Pendant, Dendritic Quartz in Sterling Silver (made and designed by Brett Kosnar)
Brazil
59.92 ct (Dendritic Quartz), 25 mm (stone) ; 42 mm (pendant)
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Rhodolite (great size and color)
Tanzania
7.93 ct, 15.90 mm x 10.28 mm
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Amethyst (deep color)
Anahi, Bolivia
39.02 ct, 25.87 mm x 19.67 mm
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Ring, Zircon (rich color) in Sterling Silver (desinged and made by Brett Kosnar)
Cambodia (Zircon)
2.33 ct (stone), Ring Size = 7
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Tourmaline (unique color) (cut by Brett Kosnar)
Tanzania
5.65 ct, 11.92 mm
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Fluorite (hard to find material)
Morocco
16.68 ct, 19.42 mm x 14.38 mm
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Earrings, Diamonds in 14 kt Yellow Gold
Africa
3.00 mm approx each (Diamonds), N/A
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Ring, Emerald and Diamonds in 10kt Yellow Gold
Various Localities
5.07 x 2.60 mm (Emerald), Ring Size = 6
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Ametrine (beautiful cutting!) (cut by Allyce Kosnar)
Anahi, Bolivia
6.37 ct, 12.22 mm
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Pendant and Earrings, Drusy Cobaltoan Calcite in Sterling Silver (Made by Brett Kosnar)
Katanga, Congo
40.0 (total carat weight), 16 mm x 13 mm (pendant); 15.6 mm (earrings)
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Fire Opal (cut by Allyce Kosnar)
Mexico
5.05 ct, 12.27 mm
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Ring, Tanzanite and Diamonds in Sterling Silver (designed and made by Brett Kosnar)
Tanzania
0.75 cts; 6.2 mm (Tanzanite gem), Size = 7.75
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Chrysoberyl
Sri Lanka
2.82 ct, 9.62 mm x 7.60 mm
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Ring, Purple Spinel in Sterling Silver (designed and made by Brett Kosnar)
Burma
2.20 ct (Spinel), Ring Size = 5
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Scapolite
Tanzania
4.73 ct, 13.69 mm x 10.52 mm
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Pendant, Aquamarine in Sterling Silver (made by Brett Kosnar)
Mozambique
2.46 ct; 9.93 mm x 8.05 mm (stone), 41.00 mm long (pendant)
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Sapphire
Sri Lanka
1.28 ct, 7.77 mm x 5.92 mm
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Ametrine Carving, Skull
Anahi, Bolivia
394 ct!!, 48.6 mm x 36.9 mm x 31.2 mm
View Details on Closed Item
Superb Amethyst - 2 movable bubbles (Charlie Key)
Goboboseb Mts., Brandberg, Erongo Region, Namibia
6.5 x 2.8 x 1.5 cm
View Details on Closed Item
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