Queen's Williamson diamond brooch: Reason why it's valued at £25million

QUEEN ELIZABETH'S Williamson pink diamond brooch is the second most valuable brooch in her collection, and a jewellery expert has explained why.

Queen's Williamson diamond brooch: Reason why it's valued at £25million

Royal Family: The Queen's massive £25 million brooch with the most valuable diamond in the world - MyLondon

Queen reportedly changed original use of Williamson brooch's pink diamond

The power of the brooch

The Williamson Pink Diamond Brooch

The Williamson Pink Diamond

One of the Queen's favourite brooches has Canadian roots

Queen's Williamson diamond brooch: Reason why it's valued at £25million

Queen's Williamson Pink Diamond Brooch