6.83ct red opal with orange buying fire oval cabochon 20x15mm resin 15% lab grown

Impregnated Opal
Lot CS954


 


Color: Red with Orange fire


Type: Cut Stone


Size: 20.8x15.8x3.7mm


Weight: 6.83ct


 


Classification: Lab Grown Opal Polymer Impregnated


Chemical composition: SiO2 + nH2O + Resin (15-20%)


Hardness (Mohs): 4


Specific Gravity: 1.88-1.92


Heat Resistance: 140 C


Resistance to Chemicals: Alcohol – Pass; Acetone - NG


Water: 0%


Polymer: 15-20% buying