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>Other Opal Varieties>BluesCabochonsOther Opal VarietiesBlues4mmRound4mmManmadehttp://www.firemountaingems.com/itemdetails/h203204cbH203204CBCabochon, "opal" (silica and epoxy) (man-made), dark blue, 4mm calibrated round. Sold per pkg of 4.//image1.fmgstatic.com/images/p3204cbb(3).jpg8.688.68As Low As $1.00 per cabochon