Chrysoprase — specimen 0292, photo © NMNHS
Chrysoprase — specimen 0292
no precise locality [Africa]
Weight: 0.51 ct; size: 6.07 | 4.07 | 2.80 mm; shape: oval; colour: medium dark green; strong; clarity: translucent; cut: fair; treatment: none.
More information from ‘Classification’
A green variety of chalcedony. The colour is caused by tiny inclusions of Ni-bearing layers silicates.