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Pickeringite from
Strickland Quarry (Eureka Quarry), Strickland pegmatite (Strickland-Cramer Quarry; Strickland-Cramer Mine; Strickland-Cramer Feldspar-Mica Quarries), Collins Hill, Portland, Middlesex Co., Connecticut, USA

Locality type:Quarry
Classification
Species:Pickeringite
Formula:MgAl2(SO4)4 · 22H2O
Comments:Schooner (1955) says that it "used to be found in magnificent specimens at the small cut above the main part of the Strickland Quarry. Water from the adjacent Schoonmaker shaft, in flowing over a ledge of schist, decomposed the sulphides and mica, producing this hydrosoluble sulphate in limited abundance when the pumping was halted for a while." In Schooner (1958) he elaborates: "At times, especially when water was being drained down over the ledges, the author saw several square feet of rock surface completely covered with reniform pickeringite. Even leaves and twigs, on the ground below, were incrusted. The color was frequently pure white, and the material was solid enough to obtain in sizeable pieces. A peculiar mass, over an inch thick, was found under an overhanging ledge in the principal part of the quarry."
Habit:reniform crusts
Colour:white
Abundance at site:Common
Confirmation
Validity:Believed Valid
References
References:Schooner, Richard. (1955): 90 Minerals from 1 Connecticut Hill. Rocks & Minerals: 30(7-8): 351-8.; Schooner, Richard. (1958): The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough). Published by Richard Schooner; Ralph Lieser of Pappy’s Beryl Shop, East Hampton; and Howard Pate of Fluorescent House, Branford, Connecticut.
Data
Mineral Data:Click here to view Pickeringite data
Locality Data:Click here to view Strickland Quarry (Eureka Quarry), Strickland pegmatite (Strickland-Cramer Quarry; Strickland-Cramer Mine; Strickland-Cramer Feldspar-Mica Quarries), Collins Hill, Portland, Middlesex Co., Connecticut, USA
Nearest other occurrences of Pickeringite
0.1km (0.1 miles) Schoonmaker Mine (Cramer Mine), Strickland pegmatite (Strickland-Cramer Quarry; Strickland-Cramer Mine; Strickland-Cramer Feldspar-Mica Quarries), Collins Hill, Portland, Middlesex Co., Connecticut, USA
3.8km (2.4 miles) Great Hill cobalt mines, Cobalt, East Hampton (Chatham), Middlesex Co., Connecticut, USA
3.8km (2.4 miles) State Forest Quarry #2 (State Forest No. 2 Mica Mine), Cobalt, East Hampton (Chatham), Middlesex Co., Connecticut, USA
9.3km (5.7 miles) Linkpot cut, Airline Railroad, East Hampton (Chatham), Middlesex Co., Connecticut, USA
39.5km (24.5 miles) State Route 8 exit 37, Watertown, Litchfield Co., Connecticut, USA
43.7km (27.1 miles) Harwinton, Litchfield Co., Connecticut, USA
62.8km (39.0 miles) Old Mine Park (Old Tungsten Mine), Long Hill, Trumbull, Fairfield County, Connecticut, USA
62.9km (39.1 miles) Old Mine Plaza construction site, Long Hill, Trumbull, Fairfield County, Connecticut, USA
 
Mineral and/or Locality  
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