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Actinolite : ☐Ca2(Mg,Fe2+)5(Si8O22)(OH)2 | |
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French Creek Mines, St. Peters, Warwick Township, Chester Co., Pennsylvania, USA Bladed Actinolite with minor Malachite and limonite coatings (the extent to which both species occur at this site). Several di-pyramidal pyrite crystals, to 7mm, are also present on the specimen. Specimen from the French Creek Mine, St. Peters, Chester Co., Pennsylvania. Specimen size: 9 x 6.5cm. From the PA Annex of my personal collection, ... |
| © M.Heintzelman | Photo ID: 98468 View Count: 300 |
Actinolite : ☐Ca2(Mg,Fe2+)5(Si8O22)(OH)2 | |
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French Creek Mines, St. Peters, Warwick Township, Chester Co., Pennsylvania, USA Unusual blocky crystals of actinolite - most actinolite from this locality is the byssolite variety, echoed in the fibrous terminations of the crystals. Main crystal is 0.3 cm across. S402-527 #485# |
| © 2007, JGW | Photo ID: 137929 View Count: 220 |
Actinolite (Var: Byssolite) : ☐Ca2(Mg,Fe2+)5(Si8O22)(OH)2, Chalcopyrite : CuFeS2, Pyrite : FeS2, Magnetite : Fe2+Fe3+2O4 | |
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French Creek Mines, St. Peters, Warwick Township, Chester Co., Pennsylvania, USA Fiberous, hair-like Actinolite, variety Byssolite with brassy yellow crystals of Chalcopyrite, silvery dipyrmidal crystals of Pyrite and platy Magnetite. A classic association specimen from the French Creek Mine, St. Peters, Chester Co., Pennsylvania. Specimen size: 4 x 4.5cm. From the PA Annex of my personal collection, acquired in 2003. |
| © M.Heintzelman | Photo ID: 15521 View Count: 656 |
Actinolite (Var: Byssolite) : ☐Ca2(Mg,Fe2+)5(Si8O22)(OH)2 | |
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Keystone Trap Rock Quarry, Cornog, Wallace Township, Chester Co., Pennsylvania, USA Green fiberous mass of hairlike crystals of Actinolite var. Byssolite. Specimen is from the Keystone traprock Quarry, Cornog, Chester Co., Pennsylvania, Specimen size: 3.3 x 4cm. From the PA Annex of my personal collection, acquired in 2003. |
| © M.Heintzelman | Photo ID: 15516 View Count: 565 |
Actinolite (Var: Byssolite) : ☐Ca2(Mg,Fe2+)5(Si8O22)(OH)2 | |
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French Creek Mines, St. Peters, Warwick Township, Chester Co., Pennsylvania, USA Hair like Actinolite (Var: Byssolite)crystals. Size 5.5x3.2x2cm. Rafael Hernandes Corrêa-Silva Collection |
| © Brhounds | Photo ID: 58144 View Count: 322 |
Actinolite (Var: Byssolite) : ☐Ca2(Mg,Fe2+)5(Si8O22)(OH)2, Adularia : KAlSi3O8 | |
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Keystone Trap Rock Quarry, Cornog, Wallace Township, Chester Co., Pennsylvania, USA Masses of elongated green fiberous Tremolite var. Byssolite, enveloping clusters of Adularia crystals. Specimen is from The Keystone Trap Rock Quarry, Cornog, Chester Co., Pennsylvania. Specimen size: 6 x 4 cm. From the PA Annex of my personal collection, acquired in 2006. |
| © M.Heintzelman | Photo ID: 138948 View Count: 241 |
Actinolite (Var: Byssolite) : ☐Ca2(Mg,Fe2+)5(Si8O22)(OH)2, Prehnite : Ca2Al2Si3O12(OH), Limonite : FeO(OH)·nH2O | |
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Keystone Trap Rock Quarry, Cornog, Wallace Township, Chester Co., Pennsylvania, USA Acicular crystals of the byssolite variety of actinolite, stained by limonite, on prehnite crystals. Note the more stout greenish actinolite crystal on the right side of the image. S402-460 #758# Approximately 1.5 cm field of view. |
| © 2007, JGW | Photo ID: 137928 View Count: 190 |
Actinolite (Var: Byssolite) : ☐Ca2(Mg,Fe2+)5(Si8O22)(OH)2 | |
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French Creek Mines, St. Peters, Warwick Township, Chester Co., Pennsylvania, USA A mat of acicular byssolite crystals. S402-376 #250# 3.5 cm field of view. |
| © 2007, JGW | Photo ID: 141963 View Count: 170 |
Actinolite (Var: Byssolite) : ☐Ca2(Mg,Fe2+)5(Si8O22)(OH)2, Magnetite : Fe2+Fe3+2O4 | |
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French Creek Mines, St. Peters, Warwick Township, Chester Co., Pennsylvania, USA A dense matte of byssolite crystals covering magnetite octahedral crystals. 4 cm field of view. S402-375 #1170# Weigand collection (1946) |
| © 2007, JGW | Photo ID: 141965 View Count: 144 |
Actinolite (Var: Byssolite) : ☐Ca2(Mg,Fe2+)5(Si8O22)(OH)2 | |
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French Creek Mines, St. Peters, Warwick Township, Chester Co., Pennsylvania, USA A curious specimen, very light, almost fluffy mass of loosely matted acicular byssolite crystals, almost like volcanic pumice. 5 cm field of view. S402-373 #559# ex. Michigan School of Mines, circa. 1890's. |
| © 2007, JGW | Photo ID: 141964 View Count: 142 |
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