2308314) Calcite with Copper - Quincy Mine, Hancock, Houghton Co., Michigan, USA Size: 3.2 x 2.4 x 2.4 cm (miniature) Price: $ 300
A single terminated glassy scalenohedral calcite crystal is set with a minor amount of copper rich matrix. The crystal is included quite richly with reddish/copper inclusions of native copper. Very slight cleaving is present at the crystal termination, so typical of these. Overall I think in good condition damage-wise. Measures 3.2 x 2.4 x 2.4 cm in size overall. Ex David Brandon collection. C2485319) Copper - Central Mine, Central, Keweenaw Co., Michigan, USA Size: 18.1 x 8.1 x 8.0 cm (cabinet) Price: $ 12000
The Central Mine in Michigan was organized in 1854, and has the distinction of being the first mine in the district to actually make a profit. Work ceased at this mine in 1898. During its lifespan the mine produced many, many fine mineral specimens. The cabinet piece shown here is outstanding. Well defined and formed crystals of native copper to 3.1 cm in size are arranged very aesthetically over a native copper matrix. The piece is crystallized all around. There is no damage and the specimen sits perfectly for display by itself. The patina is wonderful. Good cabinet sized classics such as this are always, and will always be, in high demand. Ref: The Mineralogical Record: 23: 2. C2544289) Copper - Keweenaw Peninsula, Michigan, USA Size: 6.7 x 3.3 x 2.5 cm (miniature) Price: $ 650
For over a century, the fine mineral specimens that have come from Michigan's "Copper Country" have been prized and admired by curators and mineral collectors alike. Some of the finest known examples for species such as copper and silver ever found have come from the "UP". The chunky miniature specimen shown here is an excellent "old-timer". Large twisting well defined crystals to almost 4.0 cm in size are inter-connected and forming a floater matrix-less grouping. The patina is very good; the crystals are complete all around and damage-free. The quality is excellent. Size: 6.7 x 3.3 x 2.5 cm. Ex Jim DuFoe collection. Ref: The Mineralogical Record: 23: 2. C2544287) Copper - Keweenaw Peninsula, Michigan, USA Size: 5.8 x 2.1 x 1.3 cm (miniature) Price: $ 750
The mines of Michigan's famous "Copper Country" have afforded some of the finest examples of native copper known. The miniature shown here is quite unique and in excellent condition, showing an elongated complex crystal grouping, terminated on both ends and complete all around 360 degrees. No damage. The patina is excellent - a superb classic miniature sized native copper specimen! Ex Jim DuFoe collection. Ref: The Mineralogical Record: 23: 2. Size: 5.8 x 2.1 x 1.3 cm. C2544288) Copper - Keweenaw Peninsula, Michigan, USA Size: 5.7 x 5.5 x 3.0 cm (miniature) Price: $ 1000
Michigan's "Copper Country" is famous for its fine copper and silver specimens, among many other species. Good specimens have always been highly sought after and admired. The miniature specimen shown here is very choice with well formed crystals of native copper coming out of an epidote rich matrix. The crystals are free standing and complete all around. A unique and attractive specimen with a fine patina and damage-free crystals - a superb miniature! Ex Jim DuFoe collection. Ref: The Mineralogical Record, volume 23, number 2. C2319) Copper - Keweenaw Peninsula, Michigan, USA Size: 4.2 x 2.2 x 1.0 cm (miniature) Price: $ 1000
A superb sharply formed crystal of native copper measuring 1.3 x 1.1 x 0.6 cm in size is set up perfectly from a matrix of crystallized copper and massive quartz. No damage. The crystal has a wonderful reddish patina and is of excellent quality. The main crystal shows all around 360 degrees. Very fine and choice for this U.S. classic! Ref: The Mineralogical Record: 23: 29-41. C2544286) Copper - Keweenaw Peninsula, Michigan, USA Size: 4.4 x 3.3 x 1.9 cm (miniature) Price: $ 3500
A superb old-time classic miniature showing sharp rare tetrahexahedral groupings of native copper crystals, the largest measuring to 0.8 x 0.6 x 0.6 cm in size. No damage; the crystals show a good patina. Very rare crystal habit for native copper as shown in The Mineralogical Record, volume 23, page 47. S9508855) Silver - Kearsarge Mine, Kearsarge, Houghton Co., Michigan, USA Size: 4.9 x 4.8 x 1.1 cm (miniature) Price: $ 4500
A superbly crystallized matrix-less native silver specimen from Michigan! Braching thick crude crystals of native silver are coming off a native silver crystal "arch". Shows well all around. S1572977) Silver on Copper - Keweenaw Peninsula, Michigan, USA Size: 7.3 x 4.8 x 6 cm (small cabinet) Price: $ 4500
This is an outstanding well crystallized native silver specimen from the classic mining area in Michigan's Upper Peninsula. The specimen consists of a dark hackly crystalline mass of native copper measuring 7.3 x 4.8 x 6 cm in size, this hosting 8 choice bright elongated spinel-law twin crystals of native silver, the largest measuring to 16 mm in length. The presentation and placement of the silver crystals upon the copper matrix is perfect. There is no damage. For silver crystals from Michigan, these are very well formed and definitive. A superb piece!
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