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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Rock Crystal from
Prospect Park Quarry, Prospect Park, Passaic County, New Jersey, USA


09433770017362138522415.jpg
Rock Crystal, etc.

Prospect Park Quarry, Prospect Park, Passaic County, New Jersey, USA
09433770017362138522415.jpg
Rock Crystal, etc.

Prospect Park Quarry, Prospect Park, Passaic County, New Jersey, USA
09157610017272039085420.jpg
Rock Crystal, etc.

Prospect Park Quarry, Prospect Park, Passaic County, New Jersey, USA
Locality type:Quarry
Classification
Species:Quartz var: Rock Crystal
Formula:SiO2
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Babingtonite1
Calcite1
Data
Mineral Data:Click here to view Rock Crystal data
Locality Data:Click here to view Prospect Park Quarry, Prospect Park, Passaic County, New Jersey, USA
Data Identifiers
Mindat Occurrence Record ID:78709
Long-form Identifier:1:3:78709:3
GUID (UUID V4):0
Nearest other occurrences of Rock Crystal
1.9km (1.2 miles) ⓘBraen Quarry, Haledon, Passaic County, New Jersey, USA
4.0km (2.5 miles) ⓘUpper New Street Quarry, Paterson, Passaic County, New Jersey, USA
8.2km (5.1 miles) ⓘFrancisco Brothers Quarry, Great Notch, Little Falls Township, Passaic County, New Jersey, USA
11.1km (6.9 miles) ⓘMcDowell's Quarry (Osborne and Marsellis Quarry), Upper Montclair, Montclair, Essex County, New Jersey, USA
21.3km (13.2 miles) ⓘNew York - Susquehanna & Western Railroad tunnel, Edgewater, Bergen County, New Jersey, USA
22.0km (13.7 miles) ⓘTubby Hook occurrences, Manhattan (New York County), New York City, New York, USA
22.5km (14.0 miles) ⓘInwood Valley (Inwood), Manhattan (New York County), New York City, New York, USA
23.6km (14.7 miles) ⓘNew York - West Shore & Buffalo RR tunnel, Weehawken, Bergen Hill, Hudson County, New Jersey, USA
25.2km (15.6 miles) ⓘBeach Glen Mines (Beach Glenn Mine), Hibernia, Rockaway Township, Morris County, New Jersey, USA
36.1km (22.4 miles) ⓘWhite Plains, Westchester County, New York, USA
References
American Museum of Nat. History, NY, specimens.
Paterson, NJ, Museum specimens
Peters, Joseph J. (1984) Triassic Traprock Minerals of New Jersey. Rocks & Minerals, 59 (4) 157-183 doi:10.1080/00357529.1984.11764472
 
and/or  
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