Great Hill cobalt mines, East Hampton, Middlesex Co., Connecticut, USA

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Old cobalt mines, now in a state forest, first worked ca. 1762 under the direction of Dr. Stephaunes of Germany.

References:
- Barber, J. W. (1836) Connecticut Historical Collections, p.520.
- American Mineralogist 6 (1921) 88-90.

Mineral List:

49 entries listed. 37 valid minerals. 1 erroneous literature entry.

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