"Constructed of 18KT White Gold Containing 21 Central Genuine Earth-Mined Colorless Nearly Flawless Round Brilliant cut Diamonds weighing a total of approximately 0.15 carats F Color; VVS1-VS1 Clarity Surrounded by 30 Genuine Earth-Mined Square & Tapered Baguette cut Sky Blue Topaz weighing a total of approximately 2.50 carats *Blue Topaz, along with Turquoise & Blue Zircon, is the birthstone for those born in the month of December.. Top section of ring measuring approximately 13.5mm (0.