CA.1920 ART DECO PLATINUM ONYX & DIAMOND RING: Hand chased platinum ring with a 16 x 12 mm black onyx tablet. At the center is a bezel set round brilliant diamond and on the shaft are 6 deep set, round single cut diamonds, all totaling approx. .33 Ct. Size 4.5. Weight 4.7 grams. Sold with current Atlanta Gemological GIA graduates appraisal for $2,950.