Wide white opal ring Very beautiful ring made of solid synthetic opal. Unique unrepeatable handmade. Incredibly beautiful and varied overflow of colors depends on the lighting. The photo does not convey the play of colors. Ring to order, for you any size. Width about 10 - 11 mm ( depending on size ) "Aurora" Oparex Opal is a heat-hardened resin with a mixture of silica in a short period of time. Different from lab-grown synthetic opal with high silica percentage, it only contains 25% of silica. Within the Oparex Opal collection, Marble Opal is an interesting product as it displays a wave of color change like aurora borealis, so some people also called it as “Aurora kind opal”. Marble Opal's color pattern is very irregular.