It's the shiny, blue rock on the manicured hand of the Duchess of Cambridge and now it's reportedly worth 10 times the price that was paid for it.
According to The Telegraph, the Duchess of Cambridge's sapphire and diamond engagement ring, which belonged to the late Princess Diana, has been valued at £300,000 – that's more than $540,000AUD.
But Catherine is not the only famous woman to sport an expensive piece of jewellery on her left hand. Plenty of Hollywood starlets show off their bling too.
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