Dive into the fiery depths of man-made opal -- a kaleidoscope of opalescent color that dances in the light. All the splendor of natural opal, manufactured into a harder composite (4-5 Moh's scale) that withstands heat and cold. Beautifully resembling natural opals, man-made opals are comprised of approximately 80% silica with 20% added epoxy for hardness and consistency. Well calibrated to fit standard cabochon settings.
Cabochons>Mexican Opal>Multi-coloredCabochonsMexican OpalMulti-colored18x13mmOval13mmManmadehttp://www.firemountaingems.com/itemdetails/h203223cbH203223CBCabochon, Mexican "opal" (silica and epoxy) (man-made), 18x13mm calibrated oval. Sold individually.//image1.fmgstatic.com/images/p3223cbb.jpg32.0532.05As Low As $17.07 per cabochon