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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
Fitzgibbons Mine, Alstead, Cheshire County, New Hampshire, USA


06114190017272028074893.jpg
Autunite

Fitzgibbons Mine, Alstead, Cheshire County, New Hampshire, USA
06114190017272028074893.jpg
Autunite

Fitzgibbons Mine, Alstead, Cheshire County, New Hampshire, USA
06114190017272028074893.jpg
Autunite

Fitzgibbons Mine, Alstead, Cheshire County, New Hampshire, USA
Locality type:Mine
Classification
Species:Autunite
Formula:Ca(UO2)2(PO4)2 · 10-12H2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Autunite data
Locality Data:Click here to view Fitzgibbons Mine, Alstead, Cheshire County, New Hampshire, USA
Data Identifiers
Mindat Occurrence Record ID:50985
Long-form Identifier:1:3:50985:7
GUID (UUID V4):0
Nearest other occurrences of Autunite
2.5km (1.5 miles) ⓘAllen Quarry, Alstead, Cheshire County, New Hampshire, USA
3.1km (1.9 miles) ⓘTurner Mine, Marlow, Cheshire County, New Hampshire, USA
4.4km (2.7 miles) ⓘBeryl Mountain Quarry, South Acworth, Acworth, Sullivan County, New Hampshire, USA
6.5km (4.0 miles) ⓘBig Mine, Alstead, Cheshire County, New Hampshire, USA
8.0km (4.9 miles) ⓘFrench Mine, Alstead, Cheshire County, New Hampshire, USA
10.7km (6.6 miles) ⓘChickering Mine, Walpole, Cheshire County, New Hampshire, USA
21.3km (13.2 miles) ⓘSargent Mine, Claremont, Sullivan County, New Hampshire, USA
54.9km (34.1 miles) ⓘRuggles Mine, Grafton, Grafton County, New Hampshire, USA
63.6km (39.5 miles) ⓘE.E. Smith Mine, Alexandria, Grafton County, New Hampshire, USA
63.8km (39.6 miles) ⓘBullock Quarry, E.E. Smith Mine, Alexandria, Grafton County, New Hampshire, USA
References
Smith, Arthur E. (2005) New Hampshire mineral locality index. Rocks & Minerals, 80 (4) 242-261 doi:10.3200/rmin.80.4.242-261
 
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