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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Columbite-(Fe)-Columbite-(Mn) Series from
Pelton's Quarry, Portland, Middlesex County, Connecticut, USA


Locality type:Quarry
Classification
Species:'Columbite-(Fe)-Columbite-(Mn) Series' (not an IMA approved species)
Habit:tabular
Colour:black with colorful iridescence
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
Associated Minerals Based on Photo Data:
Beryl1
Gahnite1
Quartz1
Albite1
Data
Mineral Data:Click here to view Columbite-(Fe)-Columbite-(Mn) Series data
Locality Data:Click here to view Pelton's Quarry, Portland, Middlesex County, Connecticut, USA
Data Identifiers
Mindat Occurrence Record ID:130227
Long-form Identifier:1:3:130227:1
GUID (UUID V4):0
Nearest other occurrences of Columbite-(Fe)-Columbite-(Mn) Series
2.0km (1.2 miles) ⓘHale-Walker prospects, Collins Hill, Portland, Middlesex County, Connecticut, USA
2.5km (1.6 miles) ⓘWalden Gem Quarry, Portland, Middlesex County, Connecticut, USA
3.3km (2.0 miles) ⓘClark Hill prospect, East Hampton, Middlesex County, Connecticut, USA
4.6km (2.9 miles) ⓘSimpson Quarry (Wiarda Quarry), South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
4.8km (3.0 miles) ⓘHollister prospects, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
4.9km (3.1 miles) ⓘGriswold Quarry, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
5.2km (3.3 miles) ⓘHusband Quarries, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
5.3km (3.3 miles) ⓘPegmatite prospects, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
5.3km (3.3 miles) ⓘEureka Quarries, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
5.6km (3.5 miles) ⓘWhite Rocks Quarry (Consolidated Quarry), White Rock Mining District, Middletown, Middlesex County, Connecticut, USA
References
Rocks & Min.: 70:403
 
and/or  
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