Herkimer Diamonds are double terminated quartz that are only found in upstate New York. They are called "diamonds" because they are unusually hard and clear (about as hard as an emerald).
Herkimer Diamonds are uncut stones; they come out of the ground with natural faceting. Each one, regardless of size, has 18 facets.
Our Herkimer Diamond Solitaire Ring is set in sterling silver.