Chrysoprase — specimen 0465, photo © NMNHS
Chrysoprase — specimen 0465
no precise locality [Africa]
Weight: 0.61 ct; size: 6.67 | 5.72 | 3.70 mm; shape: oval; colour: medium dark very slightly bluish green; strong; clarity: translucent; cut: excellent; treatment: none.
Clean specimen; design ‘Ovalimixtum ST’, 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.