18 Karat Gold, Diamond, Kunzite, & Topaz Necklace Set with pear-shaped kunzite weighing a total of 175.20 carats, framed with round brilliant diamonds weighing a total of 2.50 carats, spaced by faceted oval colorless topaz weighing a total of 8.60 carats. 18 karat rose gold 17 inches (chain length) 2.83 ounces (total weight) Due to the limitations imposed by a mounting, all diamond and gemstone weights are approximate.