Antique 90.00 Carats Opal and Diamond Dangle Earrings. Edwardian. A perfectly matched pair of pear shape drops, each weighing 45.00 carats - 90 carats total! - are delicately framed in platinum over 18 karat gold with tiny twinkling diamonds. The colorful gemstones display an iridescent palette of pastel green, blue and peach colors and are surmounted by sparkling trefoil diamond tops. Lang Antiques.