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Acanthite : Ag2S | |
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Manhan Mines (Loudville Mine; Southampton Lead Mine; Northampton Lead Mine), Easthampton, Hampshire Co., Massachusetts, USA Apparently, supergene acanthite "thorns," covering native silver wires. These crystals are hosted by apparent cerussite. Identification was based on color, crystal form and similarity to material from New Hampshire localities. Area in photo: approx. several millimeters. |
| Photo ID: 202298 View Count: 158 | |
Actinolite : ☐Ca2(Mg,Fe2+)5(Si8O22)(OH)2 | |
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Chelmsford, Middlesex Co., Massachusetts, USA View is approximately 2.5 cm across. P. Cristofono specimen & photo. Field collected 2003. |
| © 2004 Peter Cristofono | Photo ID: 21050 View Count: 604 |
Actinolite : ☐Ca2(Mg,Fe2+)5(Si8O22)(OH)2 | |
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Chelmsford, Middlesex Co., Massachusetts, USA Dark green bladed crystals to 3 cm (1-3/8 inches). (P. Cristofono specimen and photo. Field collected 2003. |
| © 2004 Peter Cristofono | Photo ID: 25661 View Count: 537 |
Actinolite : ☐Ca2(Mg,Fe2+)5(Si8O22)(OH)2, Epidote : {Ca2}{Al2Fe3+}[O|OH|SiO4|Si2O7], Grossular : Ca3Al2[SiO4]3 | |
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North Woburn, Woburn, Middlesex Co., Massachusetts, USA Dark green actinolite with yellow-green epidote and orange grossular(?). View is about 6 mm across. From an unspecified locality in the north part of Woburn. Photograph by Peter Cristofono. |
| © 2005 Peter Cristofono | Photo ID: 39667 View Count: 412 |
Actinolite : ☐Ca2(Mg,Fe2+)5(Si8O22)(OH)2 | |
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Chelmsford, Middlesex Co., Massachusetts, USA 5 mm dark green crystal. (P. Cristofono specimen and photo. Field collected 2003.) |
| © 2005 Peter Cristofono | Photo ID: 39343 View Count: 401 |
Actinolite : ☐Ca2(Mg,Fe2+)5(Si8O22)(OH)2 | |
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Chelmsford, Middlesex Co., Massachusetts, USA Actinolite crystals. Crystal on left is 58 mm (2 3/16 inch) long. P . Cristofono specimen and photo. Field-collected 2006. |
| © 2006 Peter Cristofono | Photo ID: 55311 View Count: 321 |
Actinolite : ☐Ca2(Mg,Fe2+)5(Si8O22)(OH)2 | |
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Chelmsford, Middlesex Co., Massachusetts, USA 27 mm crystal. P. Cristofono specimen and photo. Field-collected 2006. |
| © 2006 Peter Cristofono | Photo ID: 58337 View Count: 314 |
Actinolite : ☐Ca2(Mg,Fe2+)5(Si8O22)(OH)2 | |
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Chelmsford, Middlesex Co., Massachusetts, USA Medium green glassy actinolite crystals. View is about 1 cm across. P. Cristofono specimen and photo. Field-collected 2006. |
| © 2006 Peter Cristofono | Photo ID: 57114 View Count: 309 |
Actinolite : ☐Ca2(Mg,Fe2+)5(Si8O22)(OH)2 | |
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Chelmsford, Middlesex Co., Massachusetts, USA View is about 2 cm across. P. Cristofono specimen and photo. Field-collected 2006. |
| © 2006 Peter Cristofono | Photo ID: 54825 View Count: 308 |
Actinolite : ☐Ca2(Mg,Fe2+)5(Si8O22)(OH)2, Epidote : {Ca2}{Al2Fe3+}[O|OH|SiO4|Si2O7] | |
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Marlborough Junction locality, Marlborough, Middlesex Co., Massachusetts, USA 1.5 mm dark green actinolite crystal with light yellow-green epidote. P. Cristofono specimen and photo, field collected 2006. |
| © 2009 Peter Cristofono | Photo ID: 83212 View Count: 220 |
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