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Bytownite — specimen 0484, photo © NMNHS
Bytownite — specimen 0484, photo © NMNHS

Bytownitespecimen 0484


Central America
Bytownite — specimen 0484, locality map

Weight: 0.62 ct; size: 6.20 | 6.05 | 3.47 mm; shape: cushion triangle; colour: very light yellow; clarity: eye clean; cut: good; treatment: none.

Very clean specimen; good brilliant style cut. Source: Gary Eisenberg, Knoxville, Tennessee.

Other specimens
Bytownite — specimen 0133Bytownite — specimen 0284

More information from ‘Classification’

A variety of anorthite; plagioclase feldspar with an albite:anorthite molar ratio ranging from 10:90 to 30:70.