Calcite
Black Jack Mine, Imlay Mining District, Pershing County, Nevada, USA
4.1 x 3.0 x 1.7 cm. Mineral specimens are very rare from this most obscure Nevada mercury mine. This is a fantastic looking 2-generation calcite cave helectite "seahorse". Most of the piece is sugary first generation calcite. The "nose", part of the lower "body" and "tail" are overgrown with second generation very glassy, gemmy, colorless calcite ...
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