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Amphibole Supergroup from
Keystone Trap Rock Quarry, Cornog, Wallace Township, Chester Co., Pennsylvania, USA

Locality type:Quarry
Classification
Species:'Amphibole Supergroup' (not an IMA approved species)
Formula:AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Comments:Tremolite, Variety Byssolite occurs in long hairlike fiberous masses, closely associated with crystalized Prehnite and Clinozoisite at this site.
Habit:Long hair-like, fiberous
Colour:pale to deep green
Luminescent properties:none
Quality for species:Good crystals or rich for species - important (!)
Confirmation
Validity:Believed Valid
References
References:The Mineralogy of Pennstlvania 1922-1965; A. Montgomery, pg. 45
Data
Mineral Data:Click here to view Amphibole Supergroup data
Locality Data:Click here to view Keystone Trap Rock Quarry, Cornog, Wallace Township, Chester Co., Pennsylvania, USA
Nearest other occurrences of Amphibole Supergroup
12.2km (7.6 miles) French Creek Mines, St. Peters, Warwick Township, Chester Co., Pennsylvania, USA
12.2km (7.6 miles) Keim's Mine, French Creek Mines, St. Peters, Warwick Township, Chester Co., Pennsylvania, USA
13.7km (8.5 miles) Jones Mine, Morgantown, Caernarvon Township, Berks Co., Pennsylvania, USA
23.3km (14.5 miles) Brinton's Quarry, Westtown Township, Chester Co., Pennsylvania, USA
52.8km (32.8 miles) Red Pit Mine, Fulton Township, State Line Chromite Mining District, Lancaster Co., Pennsylvania, USA
55.3km (34.4 miles) North East Quarry, Cecil Co., Maryland, USA
85.6km (53.2 miles) Sherrer Quarry (C.K. Williams & Co. Quarry; Williams Quarry), C.K. Williams Quarry complex (Williams and Company Rock Quarry), Chestnut Hill (College Hill; Lafayette Hill; Mount Lafayette; Paxinosa Ridge), Easton, Northampton Co., Pennsylvania, USA
87.9km (54.6 miles) Bethlehem Mine (Swayze Mine), West Portal, Bethlehem Township, Hunterdon Co., New Jersey, USA
88.1km (54.7 miles) Marble Mountain prospect, Marble Mtn, Phillipsburg, Warren Co., New Jersey, USA
90.6km (56.3 miles) Hopewell, Mercer Co., New Jersey, USA
 
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