Gemmology
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Sphalerite — specimens [gallery view]


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.
Sphalerite — specimen 0198
0198
Spain
Cleiophane — specimen 0391
0391
Spain

Sphalerite — specimens — 2
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