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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Prehnite from
O & G Woodbury Traprock Quarry (Orenaug Quarry; O & G No. 1 Quarry), Orenaug Hills, Woodbury, Litchfield County, Connecticut, USA


04092040017411825586227.jpg
Prehnite, etc.

O & G Woodbury Traprock Quarry, Orenaug Hills, Woodbury, Litchfield County, Connecticut, USA
09244130017402571085219.jpg
Prehnite, etc.

O & G Woodbury Traprock Quarry, Orenaug Hills, Woodbury, Litchfield County, Connecticut, USA
05910300017394596189507.jpg
Prehnite, etc.

O & G Woodbury Traprock Quarry, Orenaug Hills, Woodbury, Litchfield County, Connecticut, USA
09605290017362141861950.jpg
Prehnite, etc.

O & G Woodbury Traprock Quarry, Orenaug Hills, Woodbury, Litchfield County, Connecticut, USA
07541230017402851325531.jpg
Prehnite, etc.

O & G Woodbury Traprock Quarry, Orenaug Hills, Woodbury, Litchfield County, Connecticut, USA
03419640017402570319926.jpg
Prehnite, etc.

O & G Woodbury Traprock Quarry, Orenaug Hills, Woodbury, Litchfield County, Connecticut, USA
00616200017394098354971.jpg
Prehnite, etc.

O & G Woodbury Traprock Quarry, Orenaug Hills, Woodbury, Litchfield County, Connecticut, USA
09605290017362141861950.jpg
Prehnite, etc.

O & G Woodbury Traprock Quarry, Orenaug Hills, Woodbury, Litchfield County, Connecticut, USA
08877570017411825588549.jpg
Prehnite, etc.

O & G Woodbury Traprock Quarry, Orenaug Hills, Woodbury, Litchfield County, Connecticut, USA
00633330017411825594307.jpg
Prehnite, etc.

O & G Woodbury Traprock Quarry, Orenaug Hills, Woodbury, Litchfield County, Connecticut, USA
05910300017394596189507.jpg
Prehnite, etc.

O & G Woodbury Traprock Quarry, Orenaug Hills, Woodbury, Litchfield County, Connecticut, USA
00318430017362144097157.jpg
Prehnite, etc.

O & G Woodbury Traprock Quarry, Orenaug Hills, Woodbury, Litchfield County, Connecticut, USA
Locality type:Quarry
Classification
Species:Prehnite
Formula:Ca2Al2Si3O10(OH)2
Comments:Excellent specimens in a variety of colors and sizes, associated with zeolites, datolite, apophyllite, calcite, quartz, pumpellyite.
Habit:botryoidal masses
Colour:pale blue through pale green to pale yellow to white
Quality for species:Excellent - world class for species or very significant. (!!)
Abundance at site:Common
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Fluorapophyllite-(K)27
Apophyllite Group10
Calcite7
Pumpellyite Group5
Datolite4
Sphalerite4
Anhydrite3
Analcime2
Quartz2
Pyrite2
Data
Mineral Data:Click here to view Prehnite data
Locality Data:Click here to view O & G Woodbury Traprock Quarry (Orenaug Quarry; O & G No. 1 Quarry), Orenaug Hills, Woodbury, Litchfield County, Connecticut, USA
Photo GalleryView Gallery (54 photos)
Data Identifiers
Mindat Occurrence Record ID:40056
Long-form Identifier:1:3:40056:5
GUID (UUID V4):0
Nearest other occurrences of Prehnite
3.6km (2.2 miles) ⓘO & G Southbury Quarry (Silliman Quarry; O & G No. 2 Quarry), Orenaug Hills, Woodbury, Litchfield County, Connecticut, USA
5.2km (3.2 miles) ⓘSawteeth Ridge, Southbury, New Haven County, Connecticut, USA
5.7km (3.5 miles) ⓘBates' Rock Road, Southbury, New Haven County, Connecticut, USA
15.9km (9.9 miles) ⓘInterstate 84 road cuts (Route 6A bypass), Newtown, Fairfield County, Connecticut, USA
20.3km (12.6 miles) ⓘThomaston Dam railroad cut, Thomaston Dam, Thomaston, Litchfield County, Connecticut, USA
22.8km (14.2 miles) ⓘCheshire Traprock Quarry, Cheshire, New Haven County, Connecticut, USA
26.1km (16.2 miles) ⓘNorth Street mall, Danbury, Fairfield County, Connecticut, USA
28.1km (17.5 miles) ⓘOld Mine Plaza construction site, Long Hill, Trumbull, Fairfield County, Connecticut, USA
28.2km (17.5 miles) ⓘBarcla Quarry (Clark-Barrone Quarry), Woodbridge, New Haven County, Connecticut, USA
30.6km (19.0 miles) ⓘPine Rock Quarry (Farnham Quarry), Hamden, New Haven County, Connecticut, USA
References
Zodac, Peter. (1938), Prehnite. Rocks & Minerals: 13(5): 131.
Weber, Marcelle H., Sullivan, Earle C. (1995) Connecticut Mineral Locality Index. Rocks & Minerals, 70 (6) 396-409 doi:10.1080/00357529.1995.11761569p.401
 
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