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Andesine — specimen 0320, photo © NMNHS
Andesine — specimen 0320, photo © NMNHS

Andesine — specimen 0320

Origin

Central Africa
Democratic Republic of the Congo
Andesine — specimen 0320, locality map
Data

Weight: 1.28 ct; size: 7.87 | 6.93 | 4.34 mm; shape: hexagon; colour: medium dark red; very slightly brownish; clarity: eye clean; cut: excellent; treatment: diffusion.
Notes

Very clean specimen; design ‘Hexaelongatis 2’, excellent cut by Tan Pen.

Other specimens
Andesine — specimen 0305Andesine — specimen 0306Andesine — specimen 0129Andesine — specimen 0410Andesine — specimen 0331Andesine — specimen 0726Andesine — specimen 0727Andesine — specimen 0267Andesine — specimen 0342Andesine — specimen 0345Andesine — specimen 0278Andesine — specimen 0349

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.