The World's Rarest Mineral Is So Rare It's Only Ever Been Found Once
www.sciencealert.com
There's a mineral so rare that only one specimen of it has ever been found in the entire world.

cross-posted from: https://lemmy.world/post/22607469

“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.”