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faces. Though technically incorrect, other simulated opals with various types of sparkling inclusions or shiny backings are sometimes also referred to as 'foil opals' by jewelry collectors.
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gemstones that first came into vogue during the jewelry-making boom of the late-Victorian era. Across Europe and the United States, these faux gemstones joined their
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budgets. The term 'foil' refers to an actual metal foil that was sometimes used to create reflection and sparkle behind milky glass or
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made from glass) as the need for jewelry outstripped both
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Colored
Gemstones: The Antoinette Matlins Buying Guide
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55:"Foil opal"
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