Opal triplet ring
Opal triplet set into sterling ring. Ring size M1/2. Stone 12x8mm. What is an opal triplet? A manufactured opal consisting of three layers. A paper-thin slice of solid natural transparent or translucent-coloured opal is glued to a dark backing of black glass, with a dome of clear quartz crystal glued onto the top. The crystal dome is to magnify and protect the opal. A triplet is less expensive than a doublet as less opal is used.