BOUCHERON (mount). 18k yellow gold ring presenting an emerald cut sapphire (slight chipping) in a setting of emerald-cut diamonds. calibrated diamonds. The sapphire certified by the Gem Paris laboratory dated 2022 as being unheated and of Ceylon/Sri Lanka origin. Lanka origin. Also accompanied by the gouache made in 1992 by the by Boucheron. Signed BOUCHERON MT and numbered P53174. Sapphire size: 9.3 x 9.3 x 5.7 mm Finger: 48 - Gross weight: 7 g