Datolite, Lake Superior Copper District, Keweenaw Peninsula, Michigan, ex. Jim Bailey Collection, Medium Cabinet 3 cm x 6.5 cm x 18.5 cm, $75. Online June 22
NSMW13385
Fine example of vein-type datolite with great polish and abundant small nodules. Probably from the Caledonia Mine as judged by the matrix and reddish color of datolite.