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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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Muscovite from
Noyes Mountain Quarry (Harvard Quarry), Greenwood, Oxford County, Maine, USA


03798420017272020066556.jpg
Muscovite

Noyes Mountain Quarry, Greenwood, Oxford County, Maine, USA
06092770017272022667681.jpg
Muscovite

Noyes Mountain Quarry, Greenwood, Oxford County, Maine, USA
06398980017272020152566.jpg
Sericite

Noyes Mountain Quarry, Greenwood, Oxford County, Maine, USA
07057620017272022671301.jpg
Muscovite, etc.

Noyes Mountain Quarry, Greenwood, Oxford County, Maine, USA
03798420017272020066556.jpg
Muscovite

Noyes Mountain Quarry, Greenwood, Oxford County, Maine, USA
06092770017272022667681.jpg
Muscovite

Noyes Mountain Quarry, Greenwood, Oxford County, Maine, USA
06398980017272020152566.jpg
Sericite

Noyes Mountain Quarry, Greenwood, Oxford County, Maine, USA
07057620017272022671301.jpg
Muscovite, etc.

Noyes Mountain Quarry, Greenwood, Oxford County, Maine, USA
03798420017272020066556.jpg
Muscovite

Noyes Mountain Quarry, Greenwood, Oxford County, Maine, USA
06092770017272022667681.jpg
Muscovite

Noyes Mountain Quarry, Greenwood, Oxford County, Maine, USA
06368180017272020188397.jpg
Sericite

Noyes Mountain Quarry, Greenwood, Oxford County, Maine, USA
07395500017272022753227.jpg
Muscovite, etc.

Noyes Mountain Quarry, Greenwood, Oxford County, Maine, USA
Locality type:Quarry
Classification
Species:Muscovite
Formula:KAl2(AlSi3O10)(OH)2
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Albite9
- var Cleavelandite2
Schorl7
Quartz4
Elbaite3
Cassiterite1
Cookeite1
Spodumene1
Data
Mineral Data:Click here to view Muscovite data
Locality Data:Click here to view Noyes Mountain Quarry (Harvard Quarry), Greenwood, Oxford County, Maine, USA
Photo GalleryView Gallery (9 photos)
Data Identifiers
Mindat Occurrence Record ID:28971
Long-form Identifier:1:3:28971:3
GUID (UUID V4):0
Nearest other occurrences of Muscovite
0.1km (0.0 miles) ⓘMorgan Quarry (Morgan Pit; Upper Noyes Mountain Quarry; Upper Harvard Quarry), Greenwood, Oxford County, Maine, USA
0.4km (0.2 miles) ⓘMustonen Ledge prospect, Greenwood, Oxford County, Maine, USA
0.4km (0.3 miles) ⓘOutback prospect (Gross prospect), Greenwood, Oxford County, Maine, USA
0.5km (0.3 miles) ⓘHayes Ledge Quarries (East and West), Greenwood, Oxford County, Maine, USA
0.8km (0.5 miles) ⓘWaisanen Quarry (Tamminen-Waisanen Quarry), Greenwood, Oxford County, Maine, USA
0.8km (0.5 miles) ⓘTamminen Quarry, Greenwood, Oxford County, Maine, USA
1.0km (0.6 miles) ⓘWitt Hill Chrysoberyl locality, Greenwood, Oxford County, Maine, USA
1.1km (0.7 miles) ⓘHeikkinen Quarry, Greenwood, Oxford County, Maine, USA
1.5km (0.9 miles) ⓘNubble Quarry, Greenwood, Oxford County, Maine, USA
1.6km (1.0 miles) ⓘPatch Mountain Beryl prospect, Greenwood, Oxford County, Maine, USA
References
Cameron, Eugene N.
Cameron, Eugene N., Larrabee, David M., McNair, Andrew H., Page, James J., Stewart, Glen W., Shainin, Vincent E. (1954) Pegmatite Investigations, 1942-45, in New England. Geological Survey Professional Paper 255. US Geological Survey doi:10.3133/pp255
 
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