(The Frisky) -- Kate Middleton's engagement ring just so happens to be a hand-me-down from the late Princess Diana. It's a blue sapphire surrounded by diamonds set in white gold. Although this family treasure is very dear to Prince William's heart -- it was his mother's engagement ring -- the superstitious may think that 28-year-old Kate should never have accepted it. Not because she doesn't want to marry her Prince Charming (literally), but because some believe jewelry can be cursed. Another big blue stone, the Hope Diamond, was not good luck for French royals. Louis XVI and Marie Antoinette were the last royals to enjoy the stone before it was stolen and they lost their heads.
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Kate Middleton's engagement ring is same one worn by Princess Diana
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Old wives' tale: Engagement rings may carry energy of previous owner
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Superstition: If woman removes ring before wedding, wedding may not take place
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Single women should not put ring on  engagement finger as it might curse her to be single forever
If I were @placeholder, I might have hoped for something with a little bit less bad juju.