Antiques Roadshow was left gobsmacked after the true value of her grandmother's ring was exposed. The guests was showing the expert the gorgeous ring, which boasted a large gemstone on the top.She was astounded when she discovered the stone was actually a diamond, and worth between two and three thousand pounds.Viewers went into meltdown on Twitter, with one saying: "Auction estimate of £2-£3k for that ring she thought was paste.
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