Platinum Jubilee Jewel Countdown: The Williamson Pink Diamond Brooch

We're nearly halfway through our Platinum Jubilee countdown of ten of the Queen's most sparkling platinum jewels, and today we're marveling at a magnificent Cartier brooch that features a very special diamond. When Princess Elizabeth

Pink diamond expected to fetch more than $21M at auction

Queen's Williamson Pink Diamond Brooch

The Williamson Pink Diamond

The Williamson Brooch

The Queen's Royal Jewels to Be Displayed to Celebrate the Platinum

Queen Elizabeth's Williamson Diamond Brooch

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Queen's Williamson Pink Diamond Brooch

Queen's Williamson Pink Diamond Brooch

The Williamson Pink Star

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