The Worth of Rubies

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Ian Harebottle, who’s made his career from mining colored gemstones, has an emerald the size of a pineapple locked away in a safe. He’s not sold the unique bright-green rock because it’s so rare nobody really knows what it’s worth.

Welcome to the topsy-turvy world of colored gems, where abundance can mean higher prices and scarcity makes spectacular stones untradable. It’s a very different business from diamonds, the world’s most popular precious stone, traded in a liquid global market that makes pricing relatively transparent.