Glamorous Gemstones - Sunita Nahata started off her career as a gemstone trader, and this particular collection reflects her love for multi-colored gemstones. The pieces in this collection are exclusively curated by Sunita to present unique items that incorporate fancy and exclusive gemstones cuts and color combinations. Multi Gemstone Necklace in 18Karat Rose Gold with Diamond. London Blue Topaz: 9.39 carat, 8X8mm size, Octagon shape. Amethyst: 7.19 carat, 8X8mm size, Octagon shape. Rhodolite: