14K White Gold 1/2cttw Diamond Heart Necklace. This classic diamond heart necklace contains .50cttw of round diamonds prong set with flair. Comes with a 14k white gold 18 inch chain with adjustable 16 and 17 inch jump rings. This necklace is 14K white gold and diamonds are I/J color and eye-clean SI3 clarity. Designed by Gabriel & Co., also available in yellow gold and rose gold.