Herkimer Diamond is a fascinating and unique type of quartz known for its exceptional clarity and natural faceting. Despite the name, it is not a real diamond.
Herkimer Diamonds are double-terminated quartz crystals, meaning they naturally form points at both ends. They are often exceptionally clear and sparkly.
Hardness
7 on the Mohs scale (same as all quartz)
Durable enough for jewelry, but can chip due to natural terminations
Color
Colorless to slightly smoky
Rare specimens may have light amber or rainbow inclusions
Exceptional clarity gives them a diamond-like sparkle
Where It’s Found
Herkimer County, New York, USA – the classic source and origin of the name
Other parts of New York State
Minor occurrences elsewhere, but Herkimer County is most famous
