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Quartz
Huanggang Mine No. 2, Keshiketeng Co., Chifeng Pref., Inner Mongolia AR, China
6.6 x 10.7 cm.
A divergent spray of gray-green quartz crystals with smoky to amethystine cores and sceptered terminations. The prism faces consist of hundreds of small rhombohedral faces. (Author: crosstimber)
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