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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Tremolite from
Aggregate Industries Quarry (Bayer-Mingolla Quarry; Trimount Quarry), Ashland, Middlesex County, Massachusetts, USA


Locality type:Quarry
Classification
Species:Tremolite
Formula:◻Ca2Mg5(Si8O22)(OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Tremolite data
Locality Data:Click here to view Aggregate Industries Quarry (Bayer-Mingolla Quarry; Trimount Quarry), Ashland, Middlesex County, Massachusetts, USA
Data Identifiers
Mindat Occurrence Record ID:322161
Long-form Identifier:1:3:322161:7
GUID (UUID V4):0
Nearest other occurrences of Tremolite
17.1km (10.6 miles) ⓘInterstate 290/Interstate 495 interchange road cuts, Marlborough, Middlesex County, Massachusetts, USA
22.3km (13.9 miles) ⓘRoute 9 road cut, Wellesley, Norfolk County, Massachusetts, USA
23.9km (14.8 miles) ⓘBolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA
25.7km (16.0 miles) ⓘGrants Mills, Cumberland, Providence County, Rhode Island, USA
26.1km (16.2 miles) ⓘSneech Pond copper mines (Copper Mine Hill), Cumberland, Providence County, Rhode Island, USA
26.4km (16.4 miles) ⓘMasslite Quarry, Plainville, Norfolk County, Massachusetts, USA
26.7km (16.6 miles) ⓘBeacon Pole Hill quarry, Cumberland, Providence County, Rhode Island, USA
28.2km (17.5 miles) ⓘManville Quarry, Cumberland, Providence County, Rhode Island, USA
34.4km (21.4 miles) ⓘConklin Quarry, Lime Rock, Lincoln, Providence County, Rhode Island, USA
35.2km (21.9 miles) ⓘDexter Quarry (Dexter Lime Quarry), Lime Rock, Lincoln, Providence County, Rhode Island, USA
References
Cahoon, James C. (1985). Massachusetts: A Classic Swiss Alpine Cleft Mineral Region (Boston Mineralogical Symposium program book, May 1985)
 
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