If the Armoury hasn’t sated your lust for diamonds, there is more in the Diamond Fund Exhibition. The fund dates back to 1719, when Peter the Great established the Russian Crown treasury. These gemstones and jewellery were garnered by tsars and empresses, including the 190-carat diamond given to Catherine the Great by her lover Grigory Orlov. The Great Imperial Crown, encrusted with 4936 diamonds, was the coronation crown of Catherine the Great and successive rulers.
Security is super tight and you are not allowed to bring cameras, phones or bags of any sort.