Magnesiohornblende

MAGNESIOHORNBLENDE	Ca₂[Mg₄(Al,Fe³)](Si₇Al)O₂₂(OH)₂
Locality: Soapstone Quarry, Richmond, NH
Specimen Size: 3.7 cm specimen. Intergrowth of black-green magnesiohornblende blades.
Environment: Contact metamorphic zone
Field collected: Tom Mortimer