Thank you everyone who provided information and photos. The Empress' pearls, and in particular her earrings, are superb. Does anyone have a photo of the sapphire sautoir mentioned by Ashdean? I have found the site for the Iranian Chamber Society which has photos and, of more interest, the size and history of a number of the individual gems. http://www.iranchamber.com/museum/royal_jewels/national_iranian_jewels01.php