Vintage Oriental jade & yellow gold ring marks are Likely Singaporean. Approx cabochon size 13 x 11 mm, ring size V, weight 12.9 grams. Provenance: private owner says bought at a Sydney auction house in the 2000s as natural Burmese type, Type A quality jadeite had a certificate from Gsl is lost as of time of current auction.', marks are Likely Singaporean. Approx cabochon size 13 x 11 mm, ring size V, weight 12.9 grams. Provenance: private owner says bought at a Sydney auction house in the 2000s as natural Burmese, type, Type A quality jadeite had a certificate from Gsl is lost as of time of current auction.