Fine Mineral Specimens Over $50
- Availability
- Sold
- Locality
- Central mine, Central, Keweenaw Co., Michigan, United States
- Formula
- Cu
- Size
- 5.5 x 3 x 2 cm - Sm Cabinet
- Tagged
- native element
Superb Copper specimen showing several cubic crystals and a spinel law twin 2cm long along the twinning plane.
- Availability
- Available
- Price
- $225.00
- Locality
- Indiana mine, Ontonogan Co., Michigan, United States
- Formula
- Cu
- Size
- 4.5 x 3.5 x 2.5 cm - Miniature
- Tagged
- native element
Crude Copper crystals with a dark coppery petina.
- Availability
- Available
- Price
- $75.00
- Reduced Price
- $50.00
- Locality
- Central mine, Central, Keweenaw Co., Michigan, United States
- Formula
- Cu
- Size
- 4.5 x 2.3 x 2 cm - Miniature
- Tagged
- native element
Crudely formed Copper crystals in mass.
- Availability
- Available
- Price
- $100.00
- Reduced Price
- $50.00
- Locality
- Central mine, Central, Keweenaw Co., Michigan, United States
- Formula
- Cu
- Size
- 5 x 1 x 1 cm - Miniature
- Tagged
- native element
Excellent Copper specimen with spinel-law twinning.
- Availability
- Available
- Price
- $250.00
- Reduced Price
- $195.00
- Locality
- Rudabánya, Hungary
- Formula
- Cu
- Size
- 9 x 5 x 1.5 cm - Sm Cabinet
- Tagged
- native element
Colorfull arborescent Copper specimen with red Cuprite and Malachite. Good locality for your collection.
- Availability
- Sold
- Featured
- Featured in Special Editions
- Locality
- Kearsarge mine, Houghton Co., Michigan, United States
- Formula
- Cu
- Size
- 11 x 6 x 6 cm - Cabinet
- Tagged
- Ore Minerals
Large Copper mass from amygdaloidal basalts. This specimen also contains a bit of Silver. Well over 6 million tons of native Copper has been mined from these deposits which stretch the entire length of upper Michigan from Wisconsin to Keweenaw point. The Copper occurs within open-space fillings and replacements in amygdaloidal flow tops of the Portage Lake Lava Series. These Copper deposits has been mined since prehistoric times.
