Datolite, Lake Superior Copper District, Keweenaw Peninsula, Michigan, ex. Jim Bailey Collection #346, Large Cabinet 6.0 cm x 11.0 cm x 19.5 cm, $500. Online Nov 2.
Very fine, large, well polished datolite from the Copper Country. Attributed to Keweenaw County based on matrix exterior. Rare to find this size on the market.