YEARS 1920 EMERALD AND DIAMOND RING Centred on a rectangular cut emerald set in a semi-set of brilliant-cut diamonds. Set in platinum and 18K white gold. French work. Gross weight: 7.80 g. Finger size: 51. Emerald size: approx. 11.67 x 9.81 x 6.19 mm. Emerald weight: approx. 4.80 carats. Preliminary opinion of GEM Pari: origin Russia (Ural), moderate oil. An emerald, diamond, platinum and 18K white gold ring, circa 1920. French assay mark. Gross weight : 7,80 gr. Size : 51. Emerald dimensions : 11,67 x 9,81 x 6,19 mm approx. Emerald weight : 4,80 carats approx. GEM Paris preliminary report, in his opinion : origin Russia (Oural), moderate oil.