Sterling silver opal triplet pendant. 14x8mm. *please note that all of pendants come with a free metal plated chain intended for display only. Please transfer to your own chain. Product colours may differ slightly from image shown. *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.