Bytownite — specimen 0484, photo © NMNHS
Bytownite — specimen 0484
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.
More information from ‘Classification’
A variety of anorthite; plagioclase feldspar with an albite:anorthite molar ratio ranging from 10:90 to 30:70.