An 18ct gold opal ring, set with a 21 x 16 mm opal doublet…
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An 18ct gold opal ring, set with a 21 x 16 mm opal doublet (minor chips around edges) of good colour range, size N. Wt. 10.8g.

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  • Doublet and Triplet - A doublet and a triplet are both composite imitation stones, consisting of two or three joined layers. A triplet is made with the crown and base of genuine material, but with a centre layer, usually of glass, the object being to make the stone appear larger than it really is. A doublet consists of only two layers.

    Opal doublets are quite common and consist of a thin layer of opal cemented to an opal matrix or black glass.

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