Lady's Platinum Art-Deco Sapphire & Diamond Ring. Ring Size: 7 (Can easily be resized to fit any finger) Mint, As-New Condition. Platinum Diamond and Sapphire Art-Deco Ring. Another fine ring with unfortunately no appraisal because we didn't want to tie it up for the holidays. It contains 10 round Sapphires and 20 round dimaonds. All stones are finely cut and authentic. This ring should surely appraise for $3,600. If not, we'll refund the difference. Always in style and made to last a lifetime.