Princess Nathalie of Sayn-Wittgenstein-Berleberg wearing the Khedive of Egypt Tiara at her wedding. The tiara is owned by Queen Anne-Marie of Greece but is worn at the marriage of all the female descendents of Queen Ingrid of Denmark.
A pair of Art Deco pendant earrings, Cartier Paris for Cartier New York, circa 1919. Onyx, diamonds and yellow sapphires set in platinum; flower stems and heads carved out of a single piece of onyx, with four diamonds in lily-of-the-valley settings, a central pearl and yellow sapphire drops. Image source: Cartier, by Hans Nadelohoffer