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| 18 karat blackened gold, fire opal and diamond ring by Sifen Chang. |
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| 18 karat blackened gold, jelly fire opal, and diamond ring by Sifen Chang. |
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| A black opal and diamond ring, 1920's. |
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| A fire opal, onyx and diamond ring by Wallace Chan. |
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| A large black opal and blue and green gem-set ring by Samuel Getz. |
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| A rainbow opal and diamond ring by Meister. |