Dioptase | ‪#‎Geology

Formula: CuSiO3 · H2O
System: Trigonal
Colour: Emerald Green, blue-green
Lustre: Vitreous
Hardness: 5

Locality: Tantara Mine, Kakounde, Likasi, Shaba Congo D.R.

by usageology on Flickr.
 
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