Antique Opal and Diamond Bar Brooch with Box
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Morison & Daley of Wagga Wagga, antique 9ct yellow gold bar brooch, set with an opal doublet surrounded by white diamonds, in original retailer's plush fitted box, 19th/20th century, 5.5 cm wide, 3.3 grams
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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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