Cantera opal
Cantera opal Cantera opal is found in Mexico in rhyolite host rock. It is difficult to remove the opal from the rhyolite... Read More
Boulder Opal
Boulder Opal Boulder opal is a rock that contains thin seams and patches of opal surrounded by or attached to its natural... Read More
Doublet opal
Doublet opal For gemstone use, most opal is cut and polished to form a cabochon. Solid opal refers to polished stones consisting... Read More
Synthetic Aurora opal
Synthetic Aurora opal Fine Crystalline Opals with a Non-Directional Pattern of Play-of-Color Synthetic aurora opals are available in different colors as black... Read More
Synthetic opal
Synthetic opal Opals of all varieties have been synthesized experimentally and commercially. The discovery of the ordered sphere structure of precious opal... Read More
Cat’s eye opal
Cat’s eye opal A cat’s eye opal is an opal with a cat’s eye effect visible on the top of the stone when... Read More
Opal, from Mondulkiri, Cambodia
Tags Opal
Opal, from Mondulkiri, Cambodia Opal is a hydrated amorphous form of silica (SiO2·nH2O); its water content may range from 3 to 21%... Read More