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Sphalerite — specimen 0198, photo © NMNHS
3.04 | 3.03 | 2.14 mm;
medium orangey yellow; strong;
Clean specimen; good mixed style cut.
More information from ‘Classification’
Formed under a wide range of low- to high-temperature hydrothermal conditions; in coal, limestone, and other sedimentary deposits (
Anthony et al., 2001—2005
). There are faceted specimens from Spain over 350 carats.
Gemmology — gemstones
National Museum of Natural History, Sofia
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The specimens illustrated in this site do not exist in the collections of the National Museum of Natural History, Sofia.