Ex Collection Auction: Alex Venzke

This eclectic auction features many fine and unique specimens and pieces from the collection of Alex Venzke. Recent finds, worldwide classics, historical specimens, and rarities are highlighted. Many are species and localities you normally don't see in auctions.

Filter By

Calcite (fluorescent!)
La Sambre Quarry, Landelies, Montigny-le-Tilleul, Belgium
Ex. Alex Venzke
2.3 x 2.2 x 1.6 cm
Winning Bid: $287
Siderite
Grieswies-Schwarzkopf, Rauris, Zell am See Dist., Salzburg, Austria
Ex. Alex Venzke
4.4 x 4.2 x 1.4 cm
Winning Bid: $275
Anatase on Quartz
Matskorhae, Hardangervidda West, Odda, Vestland, Norway
Ex. Efren Flores; Alex Venzke
2.8 x 0.7 x 0.7 cm
Winning Bid: $135
Vesuvianite
Hamrefjell, Ovre Eiker, Buskerud, Norway
Ex. Dr. F. Krantz; Michael Kraus; Gawan Fiore; Alex Venzke
6.4 x 4.8 x 4.0 cm
Winning Bid: $98
Hematite
Brumado, Bahia, Brazil
Ex. Gawan Fiore; Alex Venzke
2.3 x 1.7 x 1.2 cm
Winning Bid: $153
Chalcocite
Levant Mine, Trewellard, St Just, Cornwall, England, UK
Ex. Bill and Anne Cook; Alex Venzke
2.1 x 1.7 x 1.3 cm
Winning Bid: $360
Magnesio-hastingsite (recent find)
Black Tuesday Claim, Chelan Co., Washington, USA
Ex. Alex Venzke
2.2 x 1.3 x 1.3 cm
Winning Bid: $301
Canadian Tourmaline on Quartz
Leduc Mine, Val-des-Monts, Outaouais, Québec, Canada
Ex. Wendy and Frank Melanson; Alex Venzke
2.7 x 1.3 x 1.5 cm
Winning Bid: $60
Vanadinite
Puzzler Mine, Castle Dome Mining Dist., Yuma Co., Arizona, USA
Ex. Alex Venzke
2.6 x 2.5 x 1.4 cm
Winning Bid: $80
Epidote
Knappenwand, Untersulzbach valley, Zell am See dist., Salzburg, Austria
Ex. William Panczner; Alex Venzke
2.2 x 1.0 x 0.5 cm
Winning Bid: $90
Baryte
Rosebud Mine, Rosebud Mining Dist., Pershing Co., Nevada, USA
Ex. Alex Venzke
3.0 x 2.4 x 2.1 cm
Winning Bid: $150
Amethyst on Quartz
Jackson Crossroads Amethyst Mine, Wilkes Co., Georgia, USA
Ex. Alex Venzke
5.8 x 5.7 x 4.8 cm
Winning Bid: $198
Anatase on Quartz
Matskorhae, Hardangervidda West, Odda, Vestland, Norway
Ex. Erika Schneider; Alex Venzke
2.7 x 1.5 x 1.1 cm
Winning Bid: $602
Brookite (unusual locality)
Nibbenut, Hardangervidda West, Odda, Vestland, Norway
Ex. Alex Venzke
2.0 x 1.8 x 1.5 cm
Winning Bid: $98
Fluorite on Quartz
Riemvasmaak, Kakamas, Northern Cape, South Africa
Ex. Alex Venzke
3.0 x 2.8 x 2.7 cm
Winning Bid: $190
Azurite and Malachite pocket (old Arizona!)
Czar Mine, Copper Queen Mine, Bisbee, Cochise Co., Arizona, USA
Ex. Alex Venzke
3.2 x 2.3 x 1.6 cm
Winning Bid: $825
Malachite ps. Azurite
Sir Dominick Mine, Yudnamutana Dist., South Australia, Australia
Ex. Washington Roebling; NMNH; Kay Robertson; Alex Venzke
3.2 x 2.4 x 2.2 cm
Winning Bid: $260
Topaz
Thomas Range, Juab Co., Utah, USA
Ex. Alex Venzke
2.0 x 1.2 x 0.8 cm
Winning Bid: $80
Rutile in Smoky Quartz (rare locale)
Mt. Storenut, Hardangervidda West, Odda, Vestland, Norway
Ex. Alvaro Chicote; Max Burgi; Alex Venzke
2.8 x 2.6 x 1.7 cm
Winning Bid: $192
Rutile
Oropa, Biella Prov., Piedmont, Italy
Ex. Wendy and Frank Melanson; Alex Venzke
2.8 x 2.1 x 1.2 cm
Winning Bid: $198
Calcite
Helgustadir Mine, Fjarðabyggð, Eastern Region, Iceland
Ex. Doug Toland; Gawan Fiore; Alex Venzke
5.5 x 2.9 x 1.8 cm
Winning Bid: $190
Titanite
Bear Lake diggings, Haliburton Co., Ontario, Canada
Ex. Royal Ontario Museum; Wendy and Frank Melanson; Alex Venzke
2.3 x 1.8 x 0.9 cm
Winning Bid: $162
Calcite and Galena
Samson Mine, St. Andreasberg, Goslar Dist., Lower Saxony, Germany
Ex. W. J. Knowlton; NMNH; Howard Belsky; Alex Venzke
4.5 x 3.5 x 3.1 cm
Winning Bid: $110
Fluorite with Hematite inclusions on Amethyst
Terry Fox Monument roadcut, Thunder Bay Dist., Ontario, Canada
Ex. Alex Venzke
4.0 x 2.7 x 1.5 cm
Winning Bid: $165
Rutile ps. Anatase
Anatase-rutile occurrence, Cuiabá, Gouveia, Minas Gerais, Brazil
Ex. Brian Kosnar; Alex Venzke
2.6 x 1.4 x 1.3 cm
Winning Bid: $145
Goethite cast
Black Berry Pocket, Sky Hawk Claim, Teller Co., Colorado, USA
Ex. Alex Venzke
2.3 x 1.8 x 1.5 cm
Winning Bid: $97
Quartz
2nd Sovetskii Mine, Dalnegorsk, Primorsky Krai, Russia
Ex. Chris Stefano; Alex Venzke
1.2 x 1.0 x 0.8 cm
Winning Bid: $135
Calcite
St. Lawrence Co., New York, USA
Ex. A.E. Foote; William Jefferis; Carnegie Museum; Alex Venzke
5.2 x 3.2 x 2.9 cm
Winning Bid: $260
Willemite var. Troostite and Calcite
Sterling Mine, Franklin Mining Dist., Sussex Co., New Jersey, USA
Ex. John Roger Mitchell; Alex Venzke
4.2 x 3.4 x 1.7 cm
Winning Bid: $79
Cassiterite (Twinned)
Sauberg Mine, Ehrenfriedersdorf, Erzgebirgskreis, Saxony, Germany
Ex. Alex Venzke
3.1 x 2.2 x 1.5 cm
Winning Bid: $79