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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Cleavelandite from
Blandford mica mines, Blandford, Hampden County, Massachusetts, USA


Locality type:Mine
Classification
Species:Albite var: Cleavelandite
Formula:Na(AlSi3O8)
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Cleavelandite data
Locality Data:Click here to view Blandford mica mines, Blandford, Hampden County, Massachusetts, USA
Data Identifiers
Mindat Occurrence Record ID:29857
Long-form Identifier:1:3:29857:1
GUID (UUID V4):0
Nearest other occurrences of Cleavelandite
26.0km (16.2 miles) ⓘClark Ledge pegmatite locality, Chesterfield, Hampshire County, Massachusetts, USA
27.3km (17.0 miles) ⓘMacomber Ledge pegmatite locality, Chesterfield, Hampshire County, Massachusetts, USA
32.0km (19.9 miles) ⓘBarrus farm pegmatite localities, Goshen, Hampshire County, Massachusetts, USA
60.2km (37.4 miles) ⓘMorris Dam Quarry (East Morris Dam), Morris, Litchfield County, Connecticut, USA
63.7km (39.6 miles) ⓘSpinelli prospect (Spinelli quarry), Glastonbury, Hartford County, Connecticut, USA
65.3km (40.6 miles) ⓘChamberlain Lane, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
66.3km (41.2 miles) ⓘHollister prospects, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
66.4km (41.3 miles) ⓘSimpson Quarry (Wiarda Quarry), South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
68.1km (42.3 miles) ⓘBrack Gem prospect (Brack prospect), East Glastonbury, Glastonbury, Hartford County, Connecticut, USA
68.6km (42.6 miles) ⓘWalden Gem Quarry, Portland, Middlesex County, Connecticut, USA
References
"Western Massachusetts Mineral Localities" by Plante, A.R., Valley Geology Press, 1992
 
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