London Blue Topaz and Diamond Halo Ring Blue Topaz 3.8 ct. Diamond 0.43 ct. 18K White Gold Other Products. Emerald and Diamond Pendant Cushion Emerald 0.70 ct. Round Emerald 0.69 ct. Diamond 1.99 ct. 22K Yellow Gold More Detail Yellow Sapphire and Diamond Ring Yellow Sapphire and Diamond Ring 18K Yellow Gold More Detail Plain Ring | Solitaire Ring | Eternity Ring 18K White Gold More Detail Flush Set Diamond Ring Diamond 0.32 ct. GIA Certified F VVS2 3 Excellent 18K Rose Gold More Detail