The Emerald Brooch with Diamonds of the House Thurn and Taxis
Emerald and Diamond Corsage Ornament. Originally belonged to Elisabeth (1815-1885) Princess Karl of Hessen-Darmstadt, born Princess of Prussia, who left it to her grand-daughter Victoria (sister of Alexandra of Hessen, later the Empress of Russia), later to become the first Marchioness of Milford Haven. She in turn left it to her daughter, Queen Louise of Sweden. The Fürst of Thurn and Taxis bought it for his wife, Princess Gloria in 1982.
Vintage Aqua Blue Topaz Blue Light Green Aurora Borealis Pin Brooch by Weiss | eBay