Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Autunite from
Thomaston Dam railroad cut, Thomaston Dam, Thomaston, Litchfield County, Connecticut, USA


Locality type:Road Cutting
Classification
Species:Autunite
Formula:Ca(UO2)2(PO4)2 · 10-12H2O
Formation:Secondary
Comments:Included in lists with no supporting information. No other primary or secondary U minerals are known from here, its detection may have been based on green UV fluorescence, possibly mistaken for the much more common opal-AN.
Confirmation
Validity:Unconfirmed/Questioned
Data
Mineral Data:Click here to view Autunite data
Locality Data:Click here to view Thomaston Dam railroad cut, Thomaston Dam, Thomaston, Litchfield County, Connecticut, USA
Data Identifiers
Mindat Occurrence Record ID:96345
Long-form Identifier:1:3:96345:3
GUID (UUID V4):0
Nearest other occurrences of Autunite
29.0km (18.0 miles) ⓘCurtis Quarry, Southford, Southbury, New Haven County, Connecticut, USA
39.4km (24.5 miles) ⓘHowe Quarry (Howe #1 Quarry; Huspband Quarry), South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
39.6km (24.6 miles) ⓘHusband Quarries, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
39.6km (24.6 miles) ⓘAndrews Quarry (old Hale Quarry; Grandfather Andrews Quarry), Portland, Middlesex County, Connecticut, USA
39.8km (24.7 miles) ⓘHale Quarry (Andrews Quarry; Glastonbury Quarry), Portland, Middlesex County, Connecticut, USA
39.9km (24.8 miles) ⓘSimpson Quarry (Wiarda Quarry), South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
40.2km (25.0 miles) ⓘHollister prospects, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
40.2km (25.0 miles) ⓘWalden Gem Quarry, Portland, Middlesex County, Connecticut, USA
40.3km (25.1 miles) ⓘGotta-Walden Prospect, Portland, Middlesex County, Connecticut, USA
41.3km (25.6 miles) ⓘStrickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
References
Januzzi, Ron E., Seaman, David M. (1976) Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Danbury, Connecticut, USA.
Segeler, Curt G., Molon, Joseph (1985) The Thomaston Dam Site Thomaston, Connecticut. Rocks & Minerals, 60 (3) 119-124 doi:10.1080/00357529.1985.11764386
 
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