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Bytownite — specimen 0133, photo © NMNHS
Bytownite — specimen 0133, photo © NMNHS

Bytownitespecimen 0133


Central America
Bytownite — specimen 0133, locality map

Weight: 2.00 ct; size: 10.12 | 8.12 | 5.22 mm; shape: pear; colour: very light yellow; clarity: eye clean; cut: good; treatment: none.

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

Other specimens
Bytownite — specimen 0284Bytownite — specimen 0484

More information from ‘Classification’

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