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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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Fluorapophyllite-(K) from
Prospect Park Quarry, Prospect Park, Passaic County, New Jersey, USA


06279830017370469913178.jpg
Fluorapophyllite-(K)

Prospect Park Quarry, Prospect Park, Passaic County, New Jersey, USA
06552800017272019054163.jpg
Fluorapophyllite-(K), etc.

Prospect Park Quarry, Prospect Park, Passaic County, New Jersey, USA
08928370017272019066332.jpg
Fluorapophyllite-(K), etc.

Prospect Park Quarry, Prospect Park, Passaic County, New Jersey, USA
05707420017272019086191.jpg
Fluorapophyllite-(K), etc.

Prospect Park Quarry, Prospect Park, Passaic County, New Jersey, USA
01162490017366290544286.jpg
Fluorapophyllite-(K)

Prospect Park Quarry, Prospect Park, Passaic County, New Jersey, USA
09054130017370469911445.jpg
Fluorapophyllite-(K), etc.

Prospect Park Quarry, Prospect Park, Passaic County, New Jersey, USA
00692730017370469925231.jpg
Fluorapophyllite-(K), etc.

Prospect Park Quarry, Prospect Park, Passaic County, New Jersey, USA
03936540017369608169213.jpg
Fluorapophyllite-(K), etc.

Prospect Park Quarry, Prospect Park, Passaic County, New Jersey, USA
06279830017370469913178.jpg
Fluorapophyllite-(K)

Prospect Park Quarry, Prospect Park, Passaic County, New Jersey, USA
01923810017272019128700.jpg
Fluorapophyllite-(K), etc.

Prospect Park Quarry, Prospect Park, Passaic County, New Jersey, USA
08928370017272019066332.jpg
Fluorapophyllite-(K), etc.

Prospect Park Quarry, Prospect Park, Passaic County, New Jersey, USA
05707420017272019086191.jpg
Fluorapophyllite-(K), etc.

Prospect Park Quarry, Prospect Park, Passaic County, New Jersey, USA
Locality type:Quarry
Classification
Species:Fluorapophyllite-(K)
Formula:KCa4(Si8O20)(F,OH) · 8H2O
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Quartz9
Stilbite-Ca6
Pectolite3
Prehnite3
Chlorite Group3
Laumontite3
Mesolite3
Calcite2
Stilbite Subgroup1
Data
Mineral Data:Click here to view Fluorapophyllite-(K) data
Locality Data:Click here to view Prospect Park Quarry, Prospect Park, Passaic County, New Jersey, USA
Photo GalleryView Gallery (4 photos)
Data Identifiers
Mindat Occurrence Record ID:38810
Long-form Identifier:1:3:38810:2
GUID (UUID V4):0
Nearest other occurrences of Fluorapophyllite-(K)
1.9km (1.2 miles) ⓘBraen Quarry, Haledon, Passaic County, New Jersey, USA
2.9km (1.8 miles) ⓘHoxie's Quarry, Paterson, Passaic County, New Jersey, USA
4.0km (2.5 miles) ⓘUpper New Street Quarry, Paterson, Passaic County, New Jersey, USA
4.1km (2.6 miles) ⓘLower New Street Quarry, Paterson, 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
20.0km (12.4 miles) ⓘInterstate 95 and George Washington Bridge Lower Level roadcut, Fort Lee, Bergen County, New Jersey, USA
21.6km (13.4 miles) ⓘLaurel Hill, Secaucus, Hudson County, New Jersey, USA
29.4km (18.3 miles) ⓘHoudaille Quarry (Summit Quarry; Commonwealth Quarry), Springfield, Springfield Township, Union County, New Jersey, USA
36.8km (22.8 miles) ⓘFanwood Quarry (Weldon Quarry), Watchung, Somerset County, New Jersey, USA
39.3km (24.4 miles) ⓘSterling Mine, Sterling Hill, Ogdensburg, Sussex County, New Jersey, USA
References
Rocks & Minerals 80:4 pp234-241
Peters, Thomas A., Peters, Joseph J. (1978) Famous Mineral Localities: Paterson, New Jersey. The Mineralogical Record, 9 (3) 157-179
 
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