Gilson (Non-Resin) Opal
Lot CS354
Color:
Black with green fire
Shape:
Oval Cabochon
Size:
12x10 mm
Weight:
3.55 ct
Quantity:
1 pcs
Classification:
Lab Grown Opal
Chemical composition:
SiO2 + nH2O
Hardness (Mohs):
6.5
Specific Gravity:
2.2-2.25
Heat Resistance:
1200 C
Water:
0%
Polymer:
0%