Best Diamond Bracelets : Formerly From the Collection of Brooke Astor. 18 Karat Gold, Platinum, 21.00 car… August 22, 2017 3086 Facebook Twitter Pinterest WhatsApp Best Diamond Bracelets : Formerly From the Collection of Brooke Astor. 18 Karat Gold, Platinum, 21.00 carats Colombian Emerald and 58.00 carats Diamond Bracelet, 1965, Van Cleef & Arpels.