Antiques Roadshow guest was terrified when a jewellery expert gave her grandmother's opal necklace a huge valuation.The woman brought along a wedding photo of her grandparents to a recent BBC episode, which was based in the Royal Botanic Garden in Edinburgh.She told expert Susan Rumfitt that despite her love of opals, she felt nervous to wear the necklace because she didn't want to leave any scratches to the exquisite gem stone."My grandfather is from Fife, my grandmother is Australian, she's an international tennis player but they actually got married not far from her in Edinburgh," the woman explained."My grandfather might have been given the opal by her father before they left Australia."Susan noticed the jewellery box was marked with.
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