ART DECO PLATINUM 1920'S 30 CARAT DIAMOND DOUBLE: ART DECO PLATINUM 1920'S 30 CARAT DIAMOND DOUBLE CLIP BROOCH Art Deco Platinum 1920's Diamond Double Clip Brooch with approximately 30 carats of diamonds. Center Diamond Weight: 30. 00 Metal Type: Platinum Metal Weight: 55. 8 gr. Stock: RR4358