Description Sterling silver ring with natural bright blue Australian boulder opal from our mine. There are natural flaws in this opal which has been electroformed to a sterling silver band. Electroforming involves a process whereby silver dust is painted around the stone and then it is suspended in a silver cyanide solution where silver is electro deposited as a thick layer of fine silver. It is then sanded and polished the same as a casting. Stone size: 10mm long x 7mm wide Ring size: US size 9 or GB size S
