Sapphire opal band ring in 18 karats yellow gold. Large ring centered by an intense blue cabochon sapphire framed by two precious opals. The white opals have a beautiful play of light : red, pink, orange, yellow and green. The gems have been cut in cabochon. Ring from 1970-1980’s.
Eagle’s head hallmark, goldsmith’s hallmark AR. French jewel.
Finger size : 56 EU or 7,5 US (size can be changed)
Width of the ring : 11 mm
Estimated weight of the sapphire : 2,25 carats
Estimated weight of the opals: 1 carat each
Weight : 8,59 gr
Gemmology and beliefs : There are several types of opal: the noble opals and the common opals. The noble opals, like this one, have a play of colours due to the light. It is composed of tiny siliceous spheres aligned and of the same diameter. When the light hits the stone, and depending on the angle from which it is viewed, the surface of the opal plays with light. The common opal does not have luminous games, these spherules are disordered, and of different diameters, the light will only give it a “milky” aspect. In the collective imagination, the opal would have the capacity to make invisible. Hence its designation as the patron saint of thieves in the late Middle Ages.