3.55ct hotsell non-resin black opal with green fire oval cabochon 12x10 mm lab grown

Gilson (Non-Resin) Opal
Lot hotsell 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%