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Mount Grace, Warwick, Franklin Co., Massachusetts, USA

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Detailed Mineral List:
Dravite
Formula: Na(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
Habit: radiating prisms
Colour: dark brown
Reference: Francis, C. A. and D. E. Lange (1988): Four Occurrences of Dravite in Western New England (Rocks and Minerals 63:455).
Photo: © 2006 Peter Cristofono. Dravite from Mount Grace, Warwick, Franklin Co., Massachusetts, USA
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Reference: Emerson, B. K. (1895): A Mineralogical Lexicon of Franklin, Hampshire, and Hampden Counties, Massachusetts (USGS Bulletin 126).
Photo: Epidote from Mount Grace, Warwick, Franklin Co., Massachusetts, USA
'Hornblende'
Reference: Emerson, B. K. (1895): A Mineralogical Lexicon of Franklin, Hampshire, and Hampden Counties, Massachusetts (USGS Bulletin 126).
Quartz
Formula: SiO2
Reference: Emerson, B. K. (1895): A Mineralogical Lexicon of Franklin, Hampshire, and Hampden Counties, Massachusetts (USGS Bulletin 126).


4 entries listed. 3 valid minerals.

References

Emerson, B. K. (1895): A Mineralogical Lexicon of Franklin, Hampshire, and Hampden Counties, Massachusetts (USGS Bulletin 126).

Francis, C. A. and D. E. Lange (1988): Four Occurrences of Dravite in Western New England (Rocks and Minerals 63:455).

Mineral and/or Locality  
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