Mineral Specimen and Product Inventory Search
- Featured in Special Editions
- Kearsarge mine, Houghton Co., Michigan, United States
- 11 x 6 x 6 cm - Cabinet
- 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.