Doublets or triplets are man made to allow miners to use gem quality stones that are too thin to be sold as gems.
Doublets are a composition of two pieces which are cemented together. Usually a thin piece of opal and a base of potch or colourless opal are used to form designs of unique and lasting beauty.
Triplets are a composition of three pieces. A thin layer of natural opal is cemented between a dark base material and a transparent protective top layer.
It’s easy to become entranced by the brilliant colours of opals, but what determines the value of these precious gemstones? The value of an opal…READ MORE