Art Deco Aigrette. The Al Thani Collection Published 09.12.2015 in Bejewelled treasures: Al-Thani Collection Previous Next Ornament, Aigrette, Paul Iribe, Turban ornament with carved emerald of platinum, with a large hexagonal carved Indian emerald from 1850–1900, with millegrain-set diamonds and channel-set calibrécut sapphires. The Al Thani Collection