Beautiful multicoloured opal triplet pendant. Sterling silver. 21x9mm. Colours may be slightly different to that shown in the image. *Please note* all of our pendants come with a free metal chain for display only. 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.