97hhshr ((BIRNESSITE, CALCITE)), $10 MINIMUM BID, Gold Hill Mine, Tooele County, Utah, 6 x 2.5 x 1.5 cm, Miniature | |
Here is a grouping of terminated stalactitic Calcite. The Calcite stalactites are dusted with black Birnessite. Black Birnessite is also inside the stalactites like a cornucopia. Birnessite is a sodium calcium manganese oxide. Specimen is from the early 1990's ex Solon Hammack. |