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Material: Genuine Sterling Silver (925 silver, 92.5% silver content) |
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Stone(s): 1 piece top grade authentic Australian black opal doublet |
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Overall Dimension (including bail): 1.3 x 0.8 x 0.2 inches |
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Inner Bail Diameter: 6 mm |
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Weight: 8 grams |
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Stamp/Mark: 925 |
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Serial Number: p17906 |
Opals form when silica gel hardens in the cracks of other rocks. Most of the world's precious opal comes from Australia, where opal is the national gem. A boulder opal is an opal that has been sliced together with its surrounding ironstone for a varied look. Fire opal from Mexico comes in shades of orange and Peruvian opal is an opaque blue-green stone. An opal doublet has polished precious opal on the top with an ironstone backing added for strength, making the slice of opal less prone to chipping.
