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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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Almandine from
Emmons Quarry, Uncle Tom Mountain, Greenwood, Oxford County, Maine, USA


Locality type:Quarry
Classification
Species:Almandine
Formula:Fe32+Al2(SiO4)3
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Almandine data
Locality Data:Click here to view Emmons Quarry, Uncle Tom Mountain, Greenwood, Oxford County, Maine, USA
Data Identifiers
Mindat Occurrence Record ID:28525
Long-form Identifier:1:3:28525:8
GUID (UUID V4):0
Nearest other occurrences of Almandine
0.9km (0.6 miles) ⓘTiger Bill Quarries, Uncle Tom Mountain, Greenwood, Oxford County, Maine, USA
4.0km (2.5 miles) ⓘRound Mountain Rose Quartz locality, Albany, Oxford County, Maine, USA
4.7km (2.9 miles) ⓘPatch Mountain Beryl prospect, Greenwood, Oxford County, Maine, USA
5.1km (3.1 miles) ⓘStearns Quarry, Albany, Oxford County, Maine, USA
5.4km (3.3 miles) ⓘHayes Ledge Quarries (East and West), Greenwood, Oxford County, Maine, USA
5.5km (3.4 miles) ⓘNoyes Mountain outcrops, Greenwood, Oxford County, Maine, USA
5.6km (3.5 miles) ⓘNoyes Mountain Quarry (Harvard Quarry), Greenwood, Oxford County, Maine, USA
5.6km (3.5 miles) ⓘMorgan Quarry (Morgan Pit; Upper Noyes Mountain Quarry; Upper Harvard Quarry), Greenwood, Oxford County, Maine, USA
5.7km (3.5 miles) ⓘMustonen Ledge prospect, Greenwood, Oxford County, Maine, USA
5.7km (3.6 miles) ⓘHeikkinen Quarry, Greenwood, Oxford County, Maine, USA
References
Thompson, Woodrow B., Joyner, Ronald L., Woodman, Raymond G., King, Vandall T. (1998) Bulletin (41), A Collector's Guide to Maine Mineral Localities (3rd ed.) Maine Geological Survey
Falster, Alexander U., Simmons, William B., Webber, Karen L., Dallaire, Donald A., Nizamoff, James W., Sprague, Raymond A. (2019) The Emmons Pegmatite, Greenwood, Oxford County, Maine. Rocks & Minerals, 94 (6) 498-519 doi:10.1080/00357529.2019.1641021
Vignola, Pietro; Demartin, Francesco; Campostrini, Italo; Falster, Alexander U; Simmons, William B; Sprague, Raymond A (2021) Crystal structure of correianevesite from the Emmons pegmatite, Uncle Tom Mountain, Greenwood, Oxford County, Maine. Bulletin de la Société Royale des Sciences de Liège, 90. 125-135
 
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