Vintage Art Deco Black Onyx Diamond Platinum Cocktail Ring

A striking vintage Art Deco black onyx and diamond platinum cocktail ring. The dramatic design of this ring features a custom cut elongated, polished black onyx of 17 mm x 8 mm set in a diamond shape with curved sides, beautifully highlighted by .45ct of old Swiss cut diamonds (TCW/G/VVS) and mounted in platinum. Bears English makers mark active from 1931 to 1941.

Further Details:

Metal: platinum
Hallmarks: A.W.C&S Ltd
Gems: 1 black onyx of 17 x 8 mm. – 30 Swiss cut diamonds totalling approx .45ct (G/VVS)
UK size: N 3/4
US size: 7
Measures: head is 22 x 13 mm. (h. x w.)
Weight: 13.5 grams
Condition: very good commensurate to age and use