The gem detective: colourless gemstones

Sparkling, colourless gemstones may appear similar to the naked eye but they can vary significantly in identity, rarity and value. Making such distinctions requires the detective skills of a qualified gemmologist. Megan Austin reports.

Identifying nameless colourless gemstones can be tricky. As the famous sleuth, Sherlock Holmes, said, “Eliminate all other factors and the one that remains is the truth.” There are too many colourless gemstones to list here, so this...

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