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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Stewartite from
Dunton Gem Quarry, Newry, Oxford County, Maine, USA


Locality type:Quarry
Classification
Species:Stewartite
Formula:Mn2+Fe23+(PO4)2(OH)2 · 8H2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Stewartite data
Locality Data:Click here to view Dunton Gem Quarry, Newry, Oxford County, Maine, USA
Data Identifiers
Mindat Occurrence Record ID:28322
Long-form Identifier:1:3:28322:3
GUID (UUID V4):0
Nearest other occurrences of Stewartite
0.2km (0.1 miles) ⓘCrooker Gem Pegmatite Quarries, Newry, Oxford County, Maine, USA
24.5km (15.2 miles) ⓘEmmons Quarry, Uncle Tom Mountain, Greenwood, Oxford County, Maine, USA
34.2km (21.2 miles) ⓘRyerson Hill Quarries, Paris, Oxford County, Maine, USA
36.3km (22.6 miles) ⓘMount Mica Quarry, Paris, Oxford County, Maine, USA
37.5km (23.3 miles) ⓘCole Quarry, Stoneham, Oxford County, Maine, USA
62.3km (38.7 miles) ⓘBerry-Havey Quarry, Poland, Androscoggin County, Maine, USA
References
Palache, Charles; Berman, Harry; Frondel, Clifford (1951) The System of Mineralogy (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. John Wiley and Sons.
 
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