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Andesine — specimen 0349, photo © NMNHS
Andesine — specimen 0349, photo © NMNHS

Andesine — specimen 0349

Origin

no precise locality [Africa]
Data

Weight: 2.35 ct; size: 9.44 | 6.60 | 6.20 mm; shape: octagon; colour: light yellow; strong; clarity: eye clean; cut: excellent; treatment: none.
Notes

Very clean specimen; angles [changed to 44, 44.7, 66.5 in the pavilion; skipping after 45 in the crown] as in ‘Opposing Corners 15’ by Robert H. Long, excellent cut by Tan Pen.

Other specimens
Andesine — specimen 0305Andesine — specimen 0306Andesine — specimen 0129Andesine — specimen 0410Andesine — specimen 0331Andesine — specimen 0320Andesine — specimen 0726Andesine — specimen 0727Andesine — specimen 0267Andesine — specimen 0342Andesine — specimen 0345Andesine — specimen 0278

More information from ‘Classification’

Andesine

A variety of albite; plagioclase feldspar with an albite:anorthite molar ratio ranging from 50:50 to 70:30.


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.