Chrysoprase — specimen 0181, photo © NMNHS
Chrysoprase — specimen 0181
Weight: 2.59 ct; size: 9.83 | 8.14 | 4.60 mm; shape: oval; colour: medium very slightly bluish green; very slightly greyish; clarity: translucent; cut: fair; treatment: none.
Clean specimen; cabochon style cut.
More information from ‘Classification’
A green variety of chalcedony. The colour is caused by tiny inclusions of Ni-bearing layers silicates.