- Horizontal Cabochon Black Star Sapphire Ring in 10K White Gold For MenUS$ 938.00Total diamond weight .15ct10K White Gold Diamond Halo Oval Amethyst Birthstone Ring For WomenUS$ 262.00Total diamond weight .03ctBristol Blue Topaze and Diamond Halo Ring in 14k White Gold for LadiesUS$ 488.00Total diamond weight .15ct