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Schorl, Actinolite (Var: Byssolite), Prehnite


Schorl : [Na][Fe2+3][Al6][(OH)3|OH|(BO3)3|Si6O18], Actinolite (Var: Byssolite) : ☐Ca2(Mg,Fe2+)5(Si8O22)(OH)2, Prehnite : Ca2Al2Si3O12(OH)

Photo Copyright © 2008, JGW, courtesy of Photographic Guide to Mineral Species  - This image is copyrighted. Unauthorized reproduction prohibited.
Locality: Keystone Trap Rock Quarry, Cornog, Wallace Township, Chester Co., Pennsylvania, USA
A 0.25 cm crytal of schorl tourmaline, with fibers of byssolite and prehnite crystals. S407-016 #1259#

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