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Aragonite : CaCO3 | |
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Brinton's Quarry, West Chester, Westtown Township, Chester Co., Pennsylvania, USA White radiating crystalline sprays of Aragonite, typical habit for the occurrence at Brintons Quarry, West Chester, Chester Co., Pennsylvania. Ex. William Yocum collection specimen. Area of view aprox: 14 x 11mm. From the PA Annex of my personal collection, acquired in 2003. |
| © M.Heintzelman | Photo ID: 21255 View Count: 419 |
Clinochlore : (Mg,Fe2+)5Al[(OH)8|AlSi3O10] | |
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Brinton's Quarry, West Chester, Westtown Township, Chester Co., Pennsylvania, USA Large dark green crystal of Clinochlore with several terminated edges. Type Locality specimen from Brintons Quarry, West Chester, Chester Co., Pennsylvania. large crystals are typical for this Dana locality. Specimen collected in the 1930s with original hand written label attached to the reverse. Specimen size: 6.5 x 5.2cm. From the PA Annex of ... |
| © M.Heintzelman | Photo ID: 21254 View Count: 417 |
Clinochlore : (Mg,Fe2+)5Al[(OH)8|AlSi3O10] | |
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Brinton's Quarry, West Chester, Westtown Township, Chester Co., Pennsylvania, USA Most likely a cleavage from larger crystal of clinochlore, from the type locality. This one has good color and shows little of the alteration usually seen in crystals from this locality. 4 cm crystal. S413-067 #1875# |
| © 2007, JGW | Photo ID: 134816 View Count: 118 |
Colerainite : 4MgO·Al2O3·2SiO2·5H2O | |
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Brinton's Quarry, West Chester, Westtown Township, Chester Co., Pennsylvania, USA White crystal rosettes of Colerainite, a rare and unusual form of Clinochlore. Specimen from Brintons Quarry, West Chester, Chester Co., Pennsylvania. A fine example of this unusual occurrence, originally from a very old Chester county collection, acquired by both William Yocum and later by Ron Sloto from whom I gratefully acquired the specimen. ... |
| © M.Heintzelman | Photo ID: 31787 View Count: 441 |
Colerainite : 4MgO·Al2O3·2SiO2·5H2O | |
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Brinton's Quarry, West Chester, Westtown Township, Chester Co., Pennsylvania, USA Very pale pastel pink colored, moderately hoppered, colerainite, most likely a variety of clinochlore, crystals, to 0.05 cm. S406-068 #942# |
| © 2007, JGW | Photo ID: 142523 View Count: 74 |
Colerainite : 4MgO·Al2O3·2SiO2·5H2O | |
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Brinton's Quarry, West Chester, Westtown Township, Chester Co., Pennsylvania, USA Very pale pastel pink colored colerainite, most likely a variety of clinochlore, crystals, to 0.05 cm. S406-067 #942# |
| © 2007, JGW | Photo ID: 142522 View Count: 57 |
Magnetite : Fe2+Fe3+2O4, Clinochlore : (Mg,Fe2+)5Al[(OH)8|AlSi3O10] | |
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Brinton's Quarry, West Chester, Westtown Township, Chester Co., Pennsylvania, USA Although generally occuring only in it's massive form at this site, tiny crystals of Magnetite do form embedded within Clinochlore. From the Brinton's Quarry, West chester, Chester Co, Pennsylvania. Field of view aprox. 12 x 9 mm. From the PA Annex of my personal collection, acquired in 2004. |
| © M.Heintzelman | Photo ID: 37610 View Count: 338 |
Vermiculite : (Mg,Fe,Al)3(Al,Si)4O10(OH)2·4H2O | |
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Brinton's Quarry, West Chester, Westtown Township, Chester Co., Pennsylvania, USA Vermiculite (old varietal name: Jeffersite). Named after famed Chester Co. collector William Jefferies, whose collection formed the core of the Carnegie Museum collection. The occurrence from this locale was later determined to be Vermiculite and this new species was invalidated . From the long closed Brinton's Quarry, West Chester, Chester Co., ... |
| © M.Heintzelman | Photo ID: 14942 View Count: 1890 |
Vermiculite : (Mg,Fe,Al)3(Al,Si)4O10(OH)2·4H2O | |
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Brinton's Quarry, West Chester, Westtown Township, Chester Co., Pennsylvania, USA A fairly attractive and unusually thick micaceous plate of dark greenish vermiculite, nicknamed Jefferisite at the time because the best were noted to have been collected by famed East Coast collector William Jefferis (whose collection later ended up at the Carnegie). It is not unreasonable to suppose that he might have donated these to the ... |
| © Rob Lavinsky | Photo ID: 21362 View Count: 516 |
Vermiculite : (Mg,Fe,Al)3(Al,Si)4O10(OH)2·4H2O | |
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Brinton's Quarry, West Chester, Westtown Township, Chester Co., Pennsylvania, USA A largish, 8 cm specimen, of jefferisite. Collected in 1978. S405-014 #44# |
| © 2007, JGW | Photo ID: 142521 View Count: 170 |
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