The story of Queen Elisabeth II, Russian Sapphire and Diamond Brooch, with the large sugarloaf Sapphire and Diamonds. Queen Mary give this brooch to her granddaughter Elizabeth, in 1953.
It was the imperial wedding present to Queen Mary from the Czar and Empress of Russia in 1894, when the brooch was the center of a curb link bracelet, see the sketch above.
Source:Royal Collection;