by sysadmin | Jul 31, 2016 | Blog
Copper Replacement Agate- Wolverine #2 Copper Mine, Houghton Co. Michigan. 2.5 cm across. These are copper (infused) replacement agates, the rarest agates to date. They were formed in the Kearsarge lode of basalt from the Kearsarge/Calumet Michigan area. They are only...
