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Kate Middleton's engagement ring is the most valuable royal ring of all time
Kate Middleton has the highest valued engagement ring compared to her royal counter parts, according to latest reports.The Duchess of Cambridge, who turned 40 this month, was proposed to by Prince William back in 2010, and money was clearly no option as he popped the question with a ring valued at £300,000. Kate's ring, which is a 12ct oval-cut Ceylon sapphire surrounded by 14 solitaire diamonds, originally belonged to her mother-in-law, Princess Diana.The inherited ring has the largest carat stone compared to other royal's engagement rings, making Kate's the most valuable ring within the royal family.