Often made up of alternate layers of chalcedony, carnelian, and cacholong. |
A polar bear made from cacholong, a rare blend of opal and quartz found only in the Ural Mountains. |
Girasol, Cacholong, hyalite, and Menilite are varieties of opal. |
Fabergé artisans carved sardonyx, nephrite and cacholong to capture Pustynnikov's careworn forehead, creased boots and chest medals. |