SUZANNE BELPERRON - YEARS 1933-1938 RARE ROCK CRYSTAL AND DIAMOND "PYRAMID" CLIP This clip consists of a truncated rock crystal pyramid topped with brilliant-cut diamonds (old cut). It is linked to a cylinder studded with old-cut diamonds and rock crystal cabochons. Mounted in platinum and 18K white gold. Unsigned French work. Hallmark of the Atelier Groëné et Darde, registered in 1928 (first period). Gross weight: 9.81 g (one chip). Dimensions: 2.7 x 2 cm. References: Raulet Sylvie, Baroin Olivier, "Suzanne Belperron", Bibliothèque des Arts 2011, pages 63, for drawings of two related clips of the same proportions, and page 34 for the text relating that the Atelier Groëné et Darde became the exclusive supplier of the Hertz company in 1933, of which Suzanne Belperron became the exclusive artistic and technical director, in the exact words of Bernard Hertz. Corbett and Landrigan, "Les bijoux de Suzanne Belperron", Thames & Hudson, 2015, page 60, the "pyramid" clip faithful to the original design and which belonged to the beautiful Dorothy Paley, page 59 for a ring with a "pyramid" theme. A rock cristal, diamond, platinum and 18K white gold clip by Suzanne Belperron, circa 1933-1938. French assay mark and Groëné et Darde maker's mark (mark from 1928, first period). Gross weight : 9,81 gr. (chip to the rock cristal) Dimensions : 2,7 x 2 cm. References: Raulet Sylvie, Baroin Olivier, "Suzanne Belperron", Bibliothèque des Arts 2011, pages 63, to discover the drawings of two related clips of the same proportions, and page 34 the text which relates that the Atelier Groëné et Darde became 1933 the exclusive supplier to Maison Hertz, of which Suzanne Belperron became the exclusive artistic and technical director, in the exact words of Bernard Hertz. Corbett and Landrigan, "The jewels of Suzanne Belperron", Thames & Hudson, 2015, page 60, the "pyramid" clip faithful to the original design and having belonged to the beautiful Dorothy Paley, page 59 for a ring reflecting the theme "pyramid".