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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Serpentine Subgroup from
O'Neil Mine, Lake Mombasha, Town of Monroe, Orange County, New York, USA


09761750017366367597736.jpg
Jenkinsite, etc.

O'Neil Mine, Lake Mombasha, Town of Monroe, Orange County, New York, USA
09761750017366367597736.jpg
Jenkinsite, etc.

O'Neil Mine, Lake Mombasha, Town of Monroe, Orange County, New York, USA
02610760017366367603900.jpg
Jenkinsite, etc.

O'Neil Mine, Lake Mombasha, Town of Monroe, Orange County, New York, USA
Locality type:Mine
Classification
Species:'Serpentine Subgroup' (not an IMA approved species)
Formula:D3[Si2O5](OH)4
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Serpentine Subgroup data
Locality Data:Click here to view O'Neil Mine, Lake Mombasha, Town of Monroe, Orange County, New York, USA
Data Identifiers
Mindat Occurrence Record ID:102790
Long-form Identifier:1:3:102790:7
GUID (UUID V4):0
Nearest other occurrences of Serpentine Subgroup
5.6km (3.5 miles) ⓘWilks & O'Neil Mine, Village of Monroe, Town of Monroe, Orange County, New York, USA
17.3km (10.8 miles) ⓘOre loading dock, Fort Montgomery, Town of Highlands, Orange County, New York, USA
19.9km (12.4 miles) ⓘPhilips Mine (Philips Pyrite Mine; Anthony's Nose Pyrrhotite Mine), Town of Philipstown, Putnam County, New York, USA
21.3km (13.2 miles) ⓘRhein Property, Amity, Town of Warwick, Orange County, New York, USA
37.2km (23.1 miles) ⓘShaft 7, Delaware Aqueduct, Town of Fishkill, Dutchess County, New York, USA
42.1km (26.1 miles) ⓘSterling Hill, Ogdensburg, Sussex County, New Jersey, USA
44.1km (27.4 miles) ⓘMontville serpentine deposit, Montville Township, Morris County, New Jersey, USA
44.1km (27.4 miles) ⓘLake Valhalla Quarry (Gordon's Crystalline Limestone Quarry), Montville Township, Morris County, New Jersey, USA
47.4km (29.5 miles) ⓘTilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA
48.5km (30.1 miles) ⓘBrown's Quarry, Town of Kent, Putnam County, New York, USA
References
James Dwight Dana (1896) Manual of Mineralogy and Petrography:
 
and/or  
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