Attributed to Pierre CONROUX (1923-2003) Lot of two gouache drawings on tracing paper comprising : - a platinum ring centered on a large cabochon-cut oval emerald, the band formed by lines of rail-set calibrated baguette-cut diamonds. - a platinum ring set with an oval cabochon emerald in a radiant surround of calibrated baguette-cut diamonds. Circa 1950-60. Dimensions: 12.5 x 8.7 cm and 16.2 x 12.5 cm. Stains, folds, one leaf torn by hand at bottom.