ART DECO PLATINUM & DIAMOND TIFFANY & CO BROOCH: Ca 1930 this brooch is stunning set with French cut square corner cushion cut diamonds unique to Tiffany & Co., referred to as ''Tiffany Pillows''. Rare mix of diamonds designed by Louis C. Tiffany and made by his French master jewelers. Signed and marked irrd/plat. Measures approx 1 9/16'' x 19/32''. Total diamond weight approx. 4.93 CTW. Total weight 11.0 grams. Sold with current Atlanta Gemological GIA graduate's appraisal for $20,000. Est. $10000/30000**