A Stunning Vintage Australian Boulder Opal Ring, Estate Handmade Sterling Silver Setting. This gorgeous artisan ring is composed of handmade sterling silver and a natural Australian boulder opal. The opal measures about 12 x 17mm oval and has beautiful natural flashes of color as it moved through the light. There are more flashes of color than the camera could pick up, peacock greens to violet blues. Overall the ring measures about 1 1/8 inches long by about 13/16 inch wide from side to side. Ring Size: about 8 1/2 (could be resized by your jeweler or ask me about using mine before shipping). This ring was acquired through an estate collection and is in lovely vintage condition.