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Herkimer Diamond

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Name:
After the localities, mostly in Herkimer County, New York, USA.
A variety of Quartz

Clear, doubly-terminated, highly lustrous Quartz crystals from Herkimer Co., New York, and surrounding area, USA. There are similar terms for quartz crystals from other locales. The variety status is derived from the rather unique appearance (morphology) of these crystals, associated with the locality.

Herkimer diamonds are a variety of quartz crystals from Herkimer, Co. New York that have been popular with collectors for more than 100 years and various localities for them in Herkimer Co. are still producing many specimens each year even though it requires a lot of hard manual labor to find good examples. They are frequently doubly terminated with prism faces about as prominent as the pyramidal terminations.

A number of other localities produce Herkimer like quartz crystals, but few if any of them can produce crystals that match the perfection, luster and transparency of the best Herkimer diamonds.

People selling Herkimer like quartz crystals from other localities often try and trade on the name by calling their quartz Herkimer quartz or Herkimer diamonds.

Of course this irritates the collectors of real Herkimer quartz and they will assert that Herkimer diamonds only come from the area around Herkimer Co., New York. Sort of like certain French people insisting that the only Champagne comes only from a particular region of France.
[Rock Currier 2013]

Classification of Herkimer Diamond

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Other Names for Herkimer Diamond

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Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for Herkimer Diamond

Localities for Herkimer Diamond

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Canada
 
  • Ontario
    • Carleton Co.
      • Osgoode Township
Michael Bainbridge Collection
USA
 
  • New York
    • Fulton Co.
      • Town of Ephratah
        • Lassellsville
Rocks & Minerals (1970) 45:581-582
No reference listed
      • Little Falls
[www.johnbetts-fineminerals.com]; Rocks & Minerals 82:472-483
      • Town of Newport
[www.johnbetts-fineminerals.com]
Rocks & Minerals 82:472-483
http://www.roadsideamerica.com/attract/NYMIDdiamond.html; Rocks & Minerals 82:472-483
New York State Museum Institute specimen
    • Montgomery Co.
      • Mohawk Township
        • Fonda
[www.johnbetts-fineminerals.com]; Rocks & Minerals 82:472-483
Rocks & Minerals 56:153-156
      • Palatine
P Cristofono collection, 2007
The New York State Museum Catalog No. 210.117
      • St Johnsville
[www.johnbetts-fineminerals.com]
    • Warren Co.
NYSM 22367; NYSM 22367
Mineral and/or Locality  
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