Yellow Sapphire and Diamond Ring Yellow Sapphire and Diamond Ring 18K Yellow Gold Other Products. Diamond Ring Diamond 0.18 ct. Pave Diamond 0.13 ct. 18K White Gold More Detail Black Diamond Rings 18K White Gold More Detail Diamond Earrings 0.56 ct. Diamond Earrings 18K Pink Gold More Detail Eternity Ring Round Diamond 0.37 ct. Baguette Diamond 1.02 ct. 18K White Gold More Detail