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A variety of chrysoberyl; exhibits chatoyancy caused by microscopic tube-like cavities or needle-like inclusions of
in an orientation parallel to the c-axis.
Cymophane — specimen 0455
, photo © NMNHS
Material from ‘Repository’
— 0.18 ct, Sri Lanka.
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.