Namely: an emerald brooch from the collection of Queen Ena of Spain. The piece, auctioned off by Christie's Auction House, is an early 20th-century emerald and diamond brooch. It is made in a ...

complete with jaw-dropping accessories including the Queen Ena's Diamond Riviere necklace and diamond drop earrings.

Among the 1,800 guests were royals from across Europe, many of whom were related to the Windsors, including King Alfonso XIII and Queen Ena of Spain, King Haakon VII and Queen Maud of Norway and Queen ...