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

The Williamson Pink Diamond Brooch

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

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Queen's best brooches: Her Majesty's Williamson diamond brooch is worth a huge £25million

Queen's Williamson Pink Diamond Brooch

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