Now Showing: Gold coin that is illegal to own; the history of the cocktail ring; and why is this Patek Philippe cost £1 million?

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Now Showing: How LVMH Became A $500 Billion Powerhouse; Patek Philippe’s Cubitus ‘Scandal’ Explained; and a Remarkable Private Watch Collection

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Now Showing: Restoration of a burnt Rolex Datejust; What's inside the largest diamond mine in the world; and a brief history of powerful gemstone amulets

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Now Showing: Restoring Tony Soprano’s Gold Rolex Day Date; cutting a massive 1000-carat gemstone; and how to make gold signet ring

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Now Showing: Inside Sri Lanka’s deadly underground mines; 100-carat rough opal fresh out of the mine gets cut; and $800,000 worth of gold in five days

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Now Showing: Cutting a huge 700-carat gemstone; Two watchmakers show how to make a perfect watch; and creating diamond and gold handcuffs

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Now Showing: Visiting the world’s largest gemstone and jewellery exhibition; inside Turkey’s illegal replica industry; and how to set up dual-band polishing lap with scoring

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Now Showing: Deep dive inside a watchmaker’s private collection; a walking tour of London’s lapidaries; and a gold mining trip in Papua New Guinea

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Now Showing: Making an 18-carat gold bracelet; 185-year old Victorian ring; and how rare gemstones are found 300-foot-deep mines?

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Now Showing: Unveil the world's second-largest diamond found in Botswana; 110-year-old yellow brazilian diamond ring; and what's inside the 50-carat uncut gem?

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Now Showing: Exploring the world of medieval jewellery; Visiting the Tucson Gem Show; Why is gold so valuable?