Andesine — specimen 0278, photo © NMNHS
no precise locality [Africa]
Weight: 0.76 ct; size: 8.74 | 5.73 | 3.10 mm; shape: hexagon; colour: light yellow; strong; clarity: eye clean; cut: very good; treatment: none.
Very clean specimen; design ‘Hexaelongatis 35-35’, very good cut by Tan Pen.
More information from ‘Classification’
A variety of albite; plagioclase feldspar with an albite:anorthite molar ratio ranging from 50:50 to 70:30.