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Image: Tiemannite-199865

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Description: Tiemannite Locality: Marysvale District (Marysvale Uranium area), Piute County, Utah, USA (Locality at mindat.org) Size: 5 x 5 x 3.9 cm. Tiemannite is a very rare mercury selenide: simply HgSe. This is the classic locality for crystals: tiny black modified tetrahedra. This specimen hosts a few superb, sharp crystals, unusually free of alteration coatings, on matrix. The crystals are small, under 2mm, but very sharp and eye-visible. Another vug, with smaller crystals, lies beneath them. Ex. Philadelphia Academy of Sciences Collection.
Title: Tiemannite-199865
Credit: http://www.mindat.org/photo-199865.html
Author: Rob Lavinsky / iRocks.com
Usage Terms: Creative Commons Attribution-Share Alike 3.0
License: CC BY-SA 3.0
License Link: http://creativecommons.org/licenses/by-sa/3.0
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