Vintage Rene Boivin. A pair of diamond earrings, each designed as a stylized diamond hoop, with a diamond double crescent top mounted in platinum, c. 1960, with certificate from Francoise Cailles Vintage Rene Boivin Composition: Platinum. Total weight of diamonds approximately 4.00 carats, platinum Color: White Made in France Wear consistent with age and use 1 1/8" long