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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Annite from
Hollister prospects, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA


Locality type:Prospect
Classification
Species:Annite
Formula:KFe32+(AlSi3O10)(OH)2
Comments:fka: biotite; listed on Table 1 of Betts (1999) with a question mark. List in Januzzi (1976) is copied from Schooner (1958) and provides no additional details.
Confirmation
Validity:Unconfirmed/Questioned
Data
Mineral Data:Click here to view Annite data
Locality Data:Click here to view Hollister prospects, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
Data Identifiers
Mindat Occurrence Record ID:763565
Long-form Identifier:1:3:763565:6
GUID (UUID V4):0
Nearest other occurrences of Annite
0.5km (0.3 miles) ⓘSimpson Quarry (Wiarda Quarry), South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
0.6km (0.4 miles) ⓘHusband Quarries, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
0.6km (0.4 miles) ⓘGriswold Quarry, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
0.7km (0.5 miles) ⓘGas pipeline excavation, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
0.9km (0.5 miles) ⓘPegmatite prospects, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
1.0km (0.6 miles) ⓘEureka Quarries, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
1.0km (0.6 miles) ⓘHowe Quarry (Howe #1 Quarry; Huspband Quarry), South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
1.4km (0.9 miles) ⓘJohn C. Wiarda Quarry, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
1.6km (1.0 miles) ⓘAndrews Quarry (old Hale Quarry; Grandfather Andrews Quarry), Portland, Middlesex County, Connecticut, USA
1.7km (1.1 miles) ⓘHale Quarry (Andrews Quarry; Glastonbury Quarry), Portland, Middlesex County, Connecticut, USA
References
Januzzi, 1976. Mineral Localities of CT and Southeastern NY State, p.148
Betts (1999)
 
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