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Chalcedony — specimen 0205, photo © NMNHS
Bulgaria, Haskovo, Stambolovo, Rabovo, 41.60905°N 25.64801°E, 185 m
12.98 | 12.20 | 9.56 mm;
Clean specimen; excellent step cut style by Tan Pen.
More information from ‘Classification’
Traditionally defined as a fibrous cryptocrystalline variety of quartz. More recently, it has been shown that much chalcedony is a mixture of quartz and
. Pure chalcedony may contain trace amounts of
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.