BOULDER OPAL cabochon

Koroit Boulder Opal custom cabochon 42.3 x 18.1 millimeters Well polished cabochon of classic Boulder Opal from Koroit, Australia with brown ironstone and little stringers of blue, violet and green fire especially along the bottom third of the cut. Cut in my shop by Trevor of Bloody Knuckles Lapidary! Cut with a sharp bezel edge cut and with a gloss polish.