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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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Fluorapatite from
Nathan Hall Quarry, East Hampton, Middlesex County, Connecticut, USA


06574220017363962655237.jpg
Fluorapatite

Nathan Hall Quarry, East Hampton, Middlesex County, Connecticut, USA
01464780017363962667674.jpg
Fluorapatite, etc.

Nathan Hall Quarry, East Hampton, Middlesex County, Connecticut, USA
07770710017363962662796.jpg
Fluorapatite, etc.

Nathan Hall Quarry, East Hampton, Middlesex County, Connecticut, USA
05386350017363962673284.jpg
Fluorapatite, etc.

Nathan Hall Quarry, East Hampton, Middlesex County, Connecticut, USA
06574220017363962655237.jpg
Fluorapatite

Nathan Hall Quarry, East Hampton, Middlesex County, Connecticut, USA
01464780017363962667674.jpg
Fluorapatite, etc.

Nathan Hall Quarry, East Hampton, Middlesex County, Connecticut, USA
07770710017363962662796.jpg
Fluorapatite, etc.

Nathan Hall Quarry, East Hampton, Middlesex County, Connecticut, USA
05386350017363962673284.jpg
Fluorapatite, etc.

Nathan Hall Quarry, East Hampton, Middlesex County, Connecticut, USA
03119990017363962687978.jpg
Fluorapatite

Nathan Hall Quarry, East Hampton, Middlesex County, Connecticut, USA
05512660017363962683197.jpg
Fluorapatite, etc.

Nathan Hall Quarry, East Hampton, Middlesex County, Connecticut, USA
00484150017363962697480.jpg
Fluorapatite, etc.

Nathan Hall Quarry, East Hampton, Middlesex County, Connecticut, USA
05391730017363962691836.jpg
Fluorapatite, etc.

Nathan Hall Quarry, East Hampton, Middlesex County, Connecticut, USA
Locality type:Quarry
Classification
Species:Fluorapatite
Formula:Ca5(PO4)3F
Comments:subhedral grains can reach several cm
Habit:anhedral to subhedral grains
Colour:pale gray-green
Luminescent properties:yellow
Quality for species:Poor for species, only of interest for locality collectors. (#)
Abundance at site:Common
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Albite20
Columbite-(Fe)12
Quartz11
Metatorbernite7
Beryl4
Almandine4
Muscovite4
Microcline2
Meta-autunite2
Schorl1
Zircon1
Opal1
- var Opal-AN1
Uranophane1
Data
Mineral Data:Click here to view Fluorapatite data
Locality Data:Click here to view Nathan Hall Quarry, East Hampton, Middlesex County, Connecticut, USA
Photo GalleryView Gallery (7 photos)
Data Identifiers
Mindat Occurrence Record ID:655642
Long-form Identifier:1:3:655642:6
GUID (UUID V4):0
Nearest other occurrences of Fluorapatite
2.0km (1.2 miles) ⓘGreat Hill cobalt mines, Cobalt, East Hampton, Middlesex County, Connecticut, USA
2.3km (1.4 miles) ⓘState Forest Quarry No. 2, Cobalt, East Hampton, Middlesex County, Connecticut, USA
3.2km (2.0 miles) ⓘPelton's Quarry, Portland, Middlesex County, Connecticut, USA
4.1km (2.5 miles) ⓘBishop Hill Schorl Locality, East Hampton, Middlesex County, Connecticut, USA
4.1km (2.6 miles) ⓘHale-Walker prospects, Collins Hill, Portland, Middlesex County, Connecticut, USA
4.2km (2.6 miles) ⓘPegmatite prospects, Collins Hill, Portland, Middlesex County, Connecticut, USA
4.3km (2.7 miles) ⓘStrickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
4.3km (2.7 miles) ⓘSchoonmaker Mine, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
4.8km (3.0 miles) ⓘCase Quarries, Portland, Middlesex County, Connecticut, USA
4.8km (3.0 miles) ⓘCase Quarry No. 1, Case Quarries, Portland, Middlesex County, Connecticut, USA
References
Moritz, Harold (n.d.) Personal Communication.
 
and/or  
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