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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Allanite Group from
Timms Hill (Tim's Hill; Iolite Hill), Haddam, Middlesex County, Connecticut, USA


Locality type:Hill
Classification
Species:'Allanite Group' (not an IMA approved species)
Formula:(A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH)
Comments:Mentioned by Foye (1922) as occurring there, but specimens are lacking.
Confirmation
Validity:Unconfirmed/Questioned
Data
Mineral Data:Click here to view Allanite Group data
Locality Data:Click here to view Timms Hill (Tim's Hill; Iolite Hill), Haddam, Middlesex County, Connecticut, USA
Data Identifiers
Mindat Occurrence Record ID:134158
Long-form Identifier:1:3:134158:4
GUID (UUID V4):0
Nearest other occurrences of Allanite Group
1.5km (0.9 miles) ⓘArnold Granite Quarry (General Brainerd Quarry; Great Hill Quarry; Hazelton Quarry; Haddam Quarry; Brookes Quarry), Haddam, Middlesex County, Connecticut, USA
13.9km (8.6 miles) ⓘHale-Walker prospects, Collins Hill, Portland, Middlesex County, Connecticut, USA
15.8km (9.8 miles) ⓘJoshua Rock Quarry, Lyme, New London County, Connecticut, USA
19.8km (12.3 miles) ⓘSimpson Quarry (Wiarda Quarry), South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
19.9km (12.4 miles) ⓘHowe Quarry (Howe #1 Quarry; Huspband Quarry), South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
20.0km (12.5 miles) ⓘHollister prospects, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
20.5km (12.7 miles) ⓘHusband Quarries, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
33.9km (21.1 miles) ⓘGoos Quarry, Waterford, New London County, Connecticut, USA
42.5km (26.4 miles) ⓘMansfield Hollow Dam, Windham, Windham County, Connecticut, USA
48.4km (30.0 miles) ⓘMasons Island Quarry, Stonington, New London County, Connecticut, USA
References
Foye, Wilbur G. (1922) Mineral localities in the vicinity of Middletown, Connecticut. American Mineralogist, 7 (1) 4-12
 
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