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