Antique Circa 1870s 18k Gold Natural Diamond Sapphire And Ruby Bracelet Antique Circa 1870s 18k Gold Natural Diamond Sapphire And Ruby Bracelet Antique Circa 1870s 18k Gold Natural Diamond Sapphire And Ruby Bracelet 1960s Diamond Gold Bracelet Gold bracelet, Antique gold bracelet, 18k 1960s Diamond Emerald Sapphire 18 Karat Yellow Gold Bracelet For Sale. A rare one off Alexander Kower bypass bracelet. Signed hand constructed yellow gold hinged item features a pear shaped prong set Ceylon sapphire (approx. 3ctw), deep blue keystone baguette sapphires (2. 5 ctw) and pave set diamonds (approx. 1. 25ctw G H VS). A fine mid century modern Southwest studio item (Scottsdale AZ) fits a 7" wrist. Item #DS130