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Siderophyllite from
Rollstone Hill Quarry, Fitchburg, Worcester Co., Massachusetts, USA

Description
Comments:	"The refractive indices are: α =1.640 β and γ = 1.645, and suggest siderophyllite." (Hitchen, 1935)
Colour:	black
Quality of samples:	not specified / average specimens
Confirmation
Validity:	Unconfirmed/Questioned
References
References:	Hitchen, 1935: Am Min 20(1):1-24
Data
Mineral Data:	Click here to view Siderophyllite data
Locality Data:	Click here to view Rollstone Hill Quarry, Fitchburg, Worcester Co., Massachusetts, USA

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