Nero Gems
Cushion Cut Opal Cabochon 4.65ct
Cushion Cut Opal Cabochon 4.65ct
Clear, transparent opal cabochon, which when moved under the light shows a diffuse opalescence with flashes of red, green, blue and yellow
Clear Opal Cabochon. The opalescence is well distributed over the surface of the gem. Most likely it is the opaque hydrophane variety: a type of unstable opal that is regularly treated by impregnation with artificial silica gel. The treatment serves to decrease the porosity of the hydrophane and stabilize it. It is recommended not to let it come into contact with liquids in general, because hydrophane absorbs them and stains. It is also sensitive to changes in humidity, which can cause the surface to crack.
Source: Ethiopia|Natural
Cut: Cabochon|Drop
Weight in Ct: 4.65
Length in mm: 15.0
Width in mm: 10.0
Height in mm:
Treatments: Impregnated
Purity: Type II
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