| | Description | |
| Comments: | Crystals commonly show the forms m(110), q(011), e(101), k(021), t(013). "Certain crystals ...recently acquired by the Harvard Museum, are somewhat complex and show, in addition to the above, the forms: g(111), o(112), i(312), n(012), Φ(023), τ(031), x(321), B(514)." (Hitchen, 1935) | | Habit: | massive and in crystals (see comments) | | Colour: | gray | | Quality of samples: | not specified / average specimens | | Rarity at site: | Common | | Confirmation | |
| Validity: | Believed Valid | | References | |
| References: | Hitchen, C. S. (1935): The Pegmatites of Fitchburg, Massachusetts (American Mineralogist 20:1-24). | | Data | |
| Mineral Data: | Click here to view Arsenopyrite data | | Locality Data: | Click here to view Rollstone Hill Quarry, Fitchburg, Worcester Co., Massachusetts, USA | | Photo Gallery | View Gallery (2 photos) |
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