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A brownish variety of obsidian.
Mahogany obsidian — specimen 0735
, photo © NMNHS
Material from ‘Repository’
— 2.86 ct, no precise locality [Africa];
— 2.47 ct, Argentina;
— 1.81 ct, Argentina.
Gemmology — gemstones
National Museum of Natural History, Sofia
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None of the specimens illustrated in this site is on display in the permanent exhibition of the National Museum of Natural History, Sofia.