Chrysoprase — specimen 0697, photo © NMNHS
Chrysoprase — specimen 0697
no precise locality [Africa]
Weight: 0.49 ct; size: 5.60 | 4.89 | 3.89 mm; shape: hexagon; colour: medium light very slightly bluish green; very slightly greyish; clarity: translucent; cut: excellent; treatment: none.
Clean specimen; design ‘Hexamixtum S 41-32’ [pavilion angle changed to 45.00], excellent cut by Tan Pen.
More information from ‘Classification’
A green variety of chalcedony. The colour is caused by tiny inclusions of Ni-bearing layers silicates.