London Blue Topaz and Diamond Halo Ring Blue Topaz 3.8 ct. Diamond 0.43 ct. 18K White Gold Other Products. Tension Set Diamond Ring Diamond 0.50 ct. GIA Certified D VS1 3 Excellent 18K Rose Gold More Detail Diamond Earrings 0.56 ct. Diamond Earrings 18K Pink Gold More Detail Flush Set Diamond Bangle Flush Set Diamond Bangle in 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