Rose gold/labradorite. Imported. Diamond:15 ct. T.w. Milky aqua: 2.25 ct. T.w. 7"L. Lobster clasp closure. Almost all gemstones and black diamonds have been treated to enhance their beauty and require special care. All gemstone carat weights (ct. T.w.) are approximate; variance may be .05 carat. Photo may have been enlarged and/or enhanced. Gemstone Treatment and Care.