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Smoky quartz — specimen 0674, photo © NMNHS
Smoky quartz — specimen 0674, photo © NMNHS

Smoky quartz — specimen 0674

Origin

South America
Brazil
Smoky quartz — specimen 0674, locality map
Data

Weight: 0.39 ct; size: 5.83 | 4.88 | 3.23 mm; shape: oval; colour: dark reddish orange; clarity: eye clean; cut: excellent; treatment: none.
Notes

Very clean specimen; design ‘Ovalimixtum ST’ [crown angle changed to 21.00], excellent cut by Tan Pen.

Other specimens
Smoky quartz — specimen 0362Smoky quartz — specimen 0251Smoky quartz — specimen 0682Smoky quartz — specimen 0202Smoky quartz — specimen 0204Smoky quartz — specimen 0350Smoky quartz — specimen 0359Smoky quartz — specimen 0401Smoky quartz — specimen 0719

More information from ‘Classification’

Smoky quartz

Smoky-grey, brown to black quartz coloured by Al-based and irradiation-induced colour centres.


Gemmology — gemstones
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The specimens illustrated in this site do not exist in the collections of the National Museum of Natural History, Sofia.