Crown Jewels: Britain's Royal Tiaras!

The Imperial State Crown is in the Jewel House in the Tower of London. 

Queen Victoria's small diamond crown on display in the Jewel House at the Tower of London.

St. Edward's Crown is the Coronation Crown of England.  The Crown is made of solid gold and is currently set with 444 semi-precious stones which were reset by Garrard in 1911 for the coronation of George III.