The crown jewels: every piece of jewellery Kate Middleton has borrowed or been gifted by the royal family - Vogue Australia
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Kate Middleton's sapphire engagement ring has a romantic history, having previously belonged to Princess Diana - Cambridgeshire Live
Kate Middleton citrine ring: The cost of the Duchess of Cambridge's rumoured 'push present' from Prince William following Prince Louis birth revealed - OK! Magazine
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Kate Middleton: Prince William's wife wears ring not in royal collection for this reason | Express.co.uk
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