What are herkimer diamonds?

Answer:
"Herkimer diamonds" are not diamonds, but clear colorless doubly-terminated quartz crystals that, at their best, can look much like diamonds. Found at a number of places near Herkimer, New York.
First answer by ID1222815454. Last edit by Zantaz. Contributor trust: 19 [recommend contributor recommended]. Question popularity: 1 [recommend question].