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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Stilbite Subgroup from
Sneech Pond copper mines (Copper Mine Hill), Cumberland, Providence County, Rhode Island, USA


Locality type:Mine
Classification
Species:'Stilbite Subgroup' (not an IMA approved species)
Formula:M6-7[Al8-9Si27-28O72] · nH2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Stilbite Subgroup data
Locality Data:Click here to view Sneech Pond copper mines (Copper Mine Hill), Cumberland, Providence County, Rhode Island, USA
Data Identifiers
Mindat Occurrence Record ID:37245
Long-form Identifier:1:3:37245:7
GUID (UUID V4):0
Nearest other occurrences of Stilbite Subgroup
19.0km (11.8 miles) ⓘManton Avenue Quarry, Manton, Providence, Providence County, Rhode Island, USA
26.1km (16.2 miles) ⓘAggregate Industries Quarry (Bayer-Mingolla Quarry; Trimount Quarry), Ashland, Middlesex County, Massachusetts, USA
35.2km (21.9 miles) ⓘBlackstone Valley shopping center site, Millbury, Worcester County, Massachusetts, USA
37.6km (23.4 miles) ⓘMarlborough Junction locality, Marlborough, Middlesex County, Massachusetts, USA
38.0km (23.6 miles) ⓘWest Roxbury Crushed Stone Quarry (West Roxbury Trap Rock Co. Quarry; Grove St. Quarry), West Roxbury, Boston, Suffolk County, Massachusetts, USA
38.3km (23.8 miles) ⓘBallard Quarry, Worcester, Worcester County, Massachusetts, USA
46.4km (28.8 miles) ⓘWauregan Quarry, Wauregan, Plainfield, Windham County, Connecticut, USA
46.5km (28.9 miles) ⓘTatnuck Hill quarry, Worcester, Worcester County, Massachusetts, USA
51.1km (31.8 miles) ⓘGranite Street Quarry (Milk Row Quarry), Somerville, Middlesex County, Massachusetts, USA
57.6km (35.8 miles) ⓘAcushnet Quarry, Acushnet, Bristol County, Massachusetts, USA
References
Miller, C. E. (1971) Rhode Island Minerals and their Locations. University of Rhode Island.
 
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