Made to emulate the look of high-quality natural opals, the universe of color and outrageous flash of man-made opal is truly captivating. All the splendor of natural opal, manufactured into a harder composite that withstands heat and cold. 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-colored4mmRound4mmManmadehttp://www.firemountaingems.com/itemdetails/h203224cbH203224CBCabochon, Mexican "opal" (silica and epoxy) (man-made), 4mm calibrated round. Sold per pkg of 4.//image1.fmgstatic.com/images/p3224cbb(3).jpg8.688.68As Low As $1.00 per cabochon