The World’s Rarest Mineral Is So Uncommon It Has Only Been Discovered Once
A mineral so rare that only one specimen has ever been found in the world exists: kyawthuite (cha-too-ite). This tiny, tawny-hued grain weighs just a third of a gram (1.61 carats), and at first glance, it might resemble amber or topaz. However, its value goes far beyond its appearance. In 2010, gemologist Kyaw Thu purchased […]
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