The gem known as "Herkimer diamond" is actually a type of quartz, like this crystal from Herkimer County, New York, USA (2 x 1.3 cm). Photo by Didier Descouens. Licensed under CC By-SA 3.0.
Article: Top Spots for Gem Hunting in the US
Credit: Didier Descouens
|Natural or man made||Natural|
|Origin details||Herkimer County, New York|