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. Gemstone Treatment and Care. All gemstone carat weights (ct. T.w.) are approximate; variance may be .05 carat. Photo may have been enlarged and/or enhanced.