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| HEDENBERGITE | CaFe2+Si2O6 |
| Locality: Elevation 2160, E. slope of knoll, south side of Burnsides Brook, Percy quadrangle, NH | |
| Specimen Size: 2 to 3 mm black pyroxene blebs in feldspar, approx. 5 cm specimen. | |
| Environment: Syenite from Pilot mass | |
| Field collected: R. W. Chapman | |