Lifeboat Foundation

There’s a mineral so rare that only one specimen of it has ever been found in the entire world.

It’s called kyawthuite (cha-too-ite), a tiny, tawny-hued grain weighing just a third of a gram (1.61 carats). On first glance, you might mistaken it for amber or topaz; but the unassuming mineral speck has value beyond measure.

The stone itself was purchased in 2010 at a market in Chaung-gyi in Myanmar by gemologist Kyaw Thu, who thought the raw gem was a mineral called scheelite. After he faceted the stone, though, he realized that he was looking at something unusual.