Herkimer Diamonds-
                      Clear Quartz Crystals
             from Herkimer County, New York                                   
Cochise College
Geology Home Page 
Roger Weller, geology instructor  ( wellerr@cochise.edu )                

last edited:  2/8/17     copyright 2017-R.Weller 

A special photo project using large photos            31 views
Photos are copyrighted by Roger Weller, but can be used copyright-free for non-commercial educational uses.
Just credit photos to R.Weller/Cochise College.

additional resources:
student paper on Herkimer diamonds
YouTube videos:

 Herkimer diamonds are exceptionally clear, colorless, shiny, double-terminated quartz crystals from the
area around Middleville, Herkimer County, New York.  The crystals were so sparkly that they were called

a very clear, double-terminated Herkimer diamond


     The Herkimer Diamonds are found in hollow pockets in a siliceous dolomite.  Rocks have to be broken
up with large steel pointed poles and sledge hammers.  Occasionally, a large pocket opens up and the
Herkimer Diamonds just tumble out like a jackpot from a Las Vegas slot machine.  Most of the time,
however, it is just hard work.

a Herkimer diamond in a small pocket


additional views of Herkimer diamond features
      single Herkimer diamond crystals  (6 views)
     large Herkimer diamonds  (2 views)
     smoky-colored Herkimer diamonds  (2 views)
     yellow Herkimer diamonds  (1 view)
     fractures in Herkimer diamonds  (2 views)
     iridescent fractures in Herkimer diamonds  (2 views)
     negative crystals in Herkimer diamonds   (4 views)
     dark inclusions in Herkimer diamonds   (7 views)
     rod-shaped inclusions in Herkimer diamonds   (3 views)
     bubble trail inclusions in Herkimer diamonds  (2 Views)