Yellow Sapphire and Diamond Ring Yellow Sapphire and Diamond Ring 18K Yellow Gold Other Products. Emerald and Diamond Halo Ring Emerald 0.48 ct. Round Diamond 0.73 ct. Baguette Diamond 0.75 ct. 18K White Gold More Detail Diamond Halo Ring 18K White Gold More Detail Solitaire Ring 18K White Gold More Detail Emerald and Diamond Pendant Cushion Emerald 0.70 ct. Round Emerald 0.69 ct. Diamond 1.99 ct. 22K Yellow Gold More Detail