Sterling silver/cabochon rose quartz backed with pink mother-of-pearl/diamonds/pink chalcedony. Imported. Pavé diamonds:39 ct. T.w. Rose quartz: 7 x 7mm. Post back. Photo may have been enlarged and/or enhanced. All gemstone carat weights (ct. T.w.) are approximate; variance may be .05 carat. Almost all gemstones and black diamonds have been treated to enhance their beauty and require special care. Gemstone Treatment and Care.