Jewelry › 18k yellow gold 21.00ct ruby and diamond necklace Image 1 of 1 18k yellow gold 21.00ct ruby and diamond necklace $14,400.00 18k yellow gold necklace featuring 21.00ct of rubies set with 1.50ct of round diamonds.RT58497IAll weights are estimated Add To Cart Added! 18k yellow gold necklace featuring 21.00ct of rubies set with 1.50ct of round diamonds.RT58497IAll weights are estimated