Chrysoprase — specimen 0107, photo © NMNHS
Chrysoprase — specimen 0107
no precise locality [Africa]
Weight: 0.52 ct; size: 6.14 | 4.04 | 2.77 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.