7dhkmr ((COLEMANITE)), $10 MINIMUM BID, Billie Mine, Furnace Creek District, Death Valley, Inyo County, California, 10 x 6.5 x 5 cm, Cabinet | |
White blocky Colemanite crystals on matrix from Death Valley. Death Valley is the type location for this mineral named after William Coleman, founder of the California Borax industry and mine owner where first found. Although mindat does not specifically mention, maybe this was the Billie Mine. This is a hydrated calcium borate containing hydroxyl. |