An Art Deco 18ct gold ring set with a top quality black opal. It displays stunning deep blue and green colours. Black opals were sourced from Lighting Ridge in New South Wales, Australia. They are the most valuable of all the opals. There three small diamonds on either side set in to the shank. The ring is finely made and really beautiful.}

A striking 18ct gold ring set with a large oval black opal. Black opals are the most desirable opals. The first recorded black opal was found in Lightning Ridge, Australia in 1873. It is the only place where black opals are sourced. This ring was made circa 1930. It displays green and blue flashes and looks fabulous on the finger.}

A really striking black opal ring. The opal displays deep bright green and blue. It is a good colour and is surrounded by well matched white diamonds. Unlike ordinary opals, black opals have carbon and iron oxide trace elements present, which cause the unusual darkness of the stone. Because of their dark body tone, the rainbow colours in a black opal stand out much better than lighter opals. This vibrancy of colour makes black opal the most valuable form of all opals. This ring was made circa 1910-1920.}

A good looking Art Deco ring. It has an 18ct white gold shank and a platinum top. It is set with a large oval shaped black opal which displays predominantly blue and green colours with some red flashes. Black opals, the most valuable of the opal range, contain every colour of the spectrum, from deepest and clearest blues and iridescent greens, through to golden orange, red and fuchsia. Due to their structure, they may contain any combination of an infinite number of patterns and show their greatest brilliance only during flashes of movement. The shoulders have three diamonds on each side.}