A CARVED CHRYSOPRASE, BLACK ONYX, RUBY, DIAMOND AND GOLD RING, BY CARTIER
Designed as an 18K gold tapering band, the front set with a section of black onyx, surmounted by a pear-shaped carved chrysoprase, within a gold frame, flanked on each side by a calibré-cut ruby and a line of circular-cut diamonds, with French hallmarks
Signed by Cartier, 1990, No. 917354