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."
It's all good, if you didn't get it wronf, none would have corrected you and 99/100 that didn't read the story wouldn't know. You provided us 35 seconds of insight second hand.
Like the guy who cut down the oldest know tree to find out how old it was. It wasn't known how old it was at the time. (They have found probably older but don't want to cut them down to find out.)