Necklace from the Van Kempen diamond parure of HM Queen Emma of the Netherlands. It was later dismantled to create the Stuart tiara (part of the House diamond parure). The pear shaped pendant diamond is the Stuart diamond.
CHANEL FINE JEWELRY
harry winston diamond wreath necklace - Google Search
Prussia - The House of Hohenzollern Royal Pink Topaz Parure, Early 19th Century. Consisting of a tiara, a pair of pendant earrings, a necklace, a stomacher, and a hinged bangle, all composed of gold, silver, pink topaz, and diamonds.