The Queen's official website disagrees on the corgis (two Corgis: Holly and Willow and two Dorgis: Candy and Vulcan. ohmygod Vulcan) But I just really enjoy that all 11 presidents are represented by a picture of Obama.
'The Heneage Jewel' [locket] Also called 'The Armada Jewel' -- 1595 -- Painting by Nicholas Hilliard. "Elizabeth I is said to have given this jewel to Sir Thomas Heneage, a Privy Counsellor the Vice-Chamberlain of the Royal Household. Via The Victoria Albert Museum.
The Imperial State Crown (1937) is worn by the Queen at each State Opening of Parliament. One of the youngest crowns in the collection, it holds a number of much older gems. The crown was remade in 1937 after the previous frame weakened under the weight of the gemstones.