CONVERTIBLE DIAMOND AND GEM-SET RING, VAN CLEEF & ARPELS, 1970S

The main ring composed of two lines set with brilliant-cut diamonds, accompanied by three interchangeable fluted rings, one made of gold, the others of chrysoprase and lapis-lazuli, size 501/2, interchangeable rings signed VCA and numbered, French assay marks for 18 carat gold (750°/00) and maker's mark, total gross weight approximately 20.34 grams, part illustrated.