More Details John Hardy cushion ring from the Bamboo Collection. Signature polished sterling silver bamboo-motif frame. Prong-set, checkerboard-cut white quartz and hematite face. Single round station at shoulder with pav black sapphire center. Petite bezel-set, round black sapphire accents. Wide, tapered, faceted half-round shank. Approx. 0.5" diam. amethyst. Handcrafted in Thailand.