Herkimer diamond
A double terminated quartz crystal known for its clarity and size
https://en.wikipedia.org/wiki/Herkimer_diamondOpen linkView original on lemmy.worldhttps://en.wikipedia.org/wiki/Herkimer_diamondOpen linkView original on lemmy.world
The mine is open to the public, for a fee. They have tool rentals, too, if you don't have your own sledge and PPE.
And they call it a mine. A MINE!
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Man ya gotta just casually throw up something from my home area when I'm dealing with incompetence working in the city with no idea when I can start my 4 hour drive home 😢