These five diamond and gem-set bangle bracelets by Oscar Heyman Brothers, New York, circa 1970s, is mounted in 18K gold and platinum. Thefive hinged bracelets with curving tops comprise two bangles set with round brilliant-cut diamonds, two with orange and blue circular-cut sapphires, and one with rubies. This beautifully sculpted and opulent stack of bangles graces the wrist with playful color and sparkle.