It is splendid! Has it ever been worn by the current Queen? It is truly wonderful.
From the blog: "In 1907, Margaret Greville purchased an emerald necklace which once belonged to Marie Antoinette. It was bought from Boucheron's, the French jewellery house located in Paris.
"Marie Antoinette, Queen of France, became a victim of the French Revolution and was executed by guillotine on 16 October 1793. After her death the necklace disappeared from sight until Margaret Greville bought it in 1907.
"When Margaret Greville died in 1942, she left her house at Polesden Lacey to the National Trust and she bequeathed the Marie Antoinette necklace and the rest of her jewels to her friend the Queen Mother."
That is a very long while for the necklace to be out of sight. How do we know it is Marie Antoinette's necklace for certain, I wonder. Who had it for over 100 years?