Dragon Minerals - Update December 16, 2018

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28158: Cuprite, Copper, and Miersite
Poteryaevskoe Mine, Rubtsovskoe Cu-Zn-Pb deposit, Rudnyi Altai, Altaiskii Krai, Russia
Miniature - 4.2 x 4.1 x 3.4 cm (1.7 x 1.6 x 1.3 inches)
122 grams (0.27 pounds)
Specimen status: Sold

From the famous find of a few years ago we have a cluster of lustrous and sharp cuprite crystals, the largest of which is 8 mm in size. About half of the specimen is crystalline copper, some of which is obviously pseudomorphed after cuprite. Scattered about are patches of waxy grayish miersite, an rare silver copper halide with somewhat variable composition, (Ag,Cu)I. Judging from the color this miersite has more silver than copper. The specimen is heavy and complete all around (so this is a floater); no significant damage is seen. Displays nicely at multiple angles. Better, I think, than the photos suggest.

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