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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
Fisher Quarry, Topsham, Sagadahoc County, Maine, USA


07123000017271926398669.jpg
Schernikite

Fisher Quarry, Topsham, Sagadahoc County, Maine, USA
06473940017362693984148.jpg
Muscovite, etc.

Fisher Quarry, Topsham, Sagadahoc County, Maine, USA
01793990017272014857683.jpg
Schernikite

Fisher Quarry, Topsham, Sagadahoc County, Maine, USA
04174800017272014864587.jpg
Schernikite, etc.

Fisher Quarry, Topsham, Sagadahoc County, Maine, USA
09155970017367069334552.jpg
Schernikite

Fisher Quarry, Topsham, Sagadahoc County, Maine, USA
06473940017362693984148.jpg
Muscovite, etc.

Fisher Quarry, Topsham, Sagadahoc County, Maine, USA
01793990017272014857683.jpg
Schernikite

Fisher Quarry, Topsham, Sagadahoc County, Maine, USA
04174800017272014864587.jpg
Schernikite, etc.

Fisher Quarry, Topsham, Sagadahoc County, Maine, USA
02037340017271926615381.jpg
Schernikite

Fisher Quarry, Topsham, Sagadahoc County, Maine, USA
02151550017374112341487.jpg
Muscovite, etc.

Fisher Quarry, Topsham, Sagadahoc County, Maine, USA
01793990017272014857683.jpg
Schernikite

Fisher Quarry, Topsham, Sagadahoc County, Maine, USA
04174800017272014864587.jpg
Schernikite, etc.

Fisher Quarry, Topsham, Sagadahoc County, Maine, USA
Locality type:Quarry
Classification
Species:Muscovite
Formula:KAl2(AlSi3O10)(OH)2
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Albite8
- var Cleavelandite5
Annite2
Lepidolite2
Cookeite2
Elbaite2
Beryl1
Quartz1
Fluorapatite1
Hydroxylherderite1
Topaz1
Data
Mineral Data:Click here to view Muscovite data
Locality Data:Click here to view Fisher Quarry, Topsham, Sagadahoc County, Maine, USA
Photo GalleryView Gallery (6 photos)
Data Identifiers
Mindat Occurrence Record ID:36235
Long-form Identifier:1:3:36235:3
GUID (UUID V4):0
Nearest other occurrences of Muscovite
0.2km (0.1 miles) ⓘMallet Quarry, Topsham, Sagadahoc County, Maine, USA
0.4km (0.2 miles) ⓘStaples Quarry, Topsham, Sagadahoc County, Maine, USA
0.7km (0.4 miles) ⓘWilliam Willes #1 Quarry, Topsham, Sagadahoc County, Maine, USA
0.8km (0.5 miles) ⓘSquare Pit (Consolidated #4 Quarry), Topsham, Sagadahoc County, Maine, USA
1.0km (0.6 miles) ⓘTwin Pits Quarry, Cathance River Nature Preserve, Topsham, Sagadahoc County, Maine, USA
1.1km (0.7 miles) ⓘSwamp #1 Quarry, Cathance River Nature Preserve, Topsham, Sagadahoc County, Maine, USA
1.1km (0.7 miles) ⓘSwamp #2 quarry, Cathance River Nature Preserve, Topsham, Sagadahoc County, Maine, USA
1.3km (0.8 miles) ⓘWilliam Willes #3 Quarry, Highland Green, Topsham, Sagadahoc County, Maine, USA
1.4km (0.9 miles) ⓘConsolidated #2 Quarry (Purington Quarry), Highland Green, Topsham, Sagadahoc County, Maine, USA
1.4km (0.9 miles) ⓘConsolidated #1 Quarry, Highland Green, Topsham, Sagadahoc County, Maine, USA
References
Bastin, E. S. (1911) Geology of the pegmatites and associated rocks of Maine, including feldspar, quartz, mica, and gem deposits. Bulletin 445. US Geological Survey doi:10.3133/b445
Clara Brennan, Samuel M. Cameron, and Mona-Liza C. Sirbescu (2016) Crystallization of the Fisher Quarry Pegmatite, Sagadahoc Co., Maine: Preliminary Insights from Fluid Inclusions. in Second Eugene E. Foord Pegmatite Symposium July 15-19, 2016 Colorado School of Mines campus, Golden, Colorado
 
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