Acanthite, Calcite
Giovanni Bonu Mine, San Vito, South Sardinia Province, Sardinia, Italy
9.7 x 7.5 x 6.4 cm. A very important old historic classic. This specimen hosts a beautiful combination of acanthite and fluorescent calcite from the Giovanni Bonu mine in Sardinia. The dark grey, matte acanthites range up to 7-8 mm, and can be quite sharp in their habit. The lustrous, gemmy calcites, which form a rich coating on the matrix, ...
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