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


Locality type:Hill
Classification
Species:Albite var: Oligoclase
Formula:(Na,Ca)[Al(Si,Al)Si2O8]
Comments:Gemmy and in large cleavable masses.
Habit:anhedral but in large cleavable masses
Colour:white to pale green
Quality for species:Good crystals or rich for species - important (!)
Abundance at site:Very common
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
Data
Mineral Data:Click here to view Oligoclase 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:134152
Long-form Identifier:1:3:134152:2
GUID (UUID V4):0
Nearest other occurrences of Oligoclase
1.1km (0.7 miles) Hill above the parsonage (unnamed feldspar quarry), Haddam, Middlesex County, Connecticut, USA
1.4km (0.9 miles) Chrysoberyl locality, Haddam, Middlesex County, Connecticut, USA
1.5km (1.0 miles) State Route 9 Interchange 13 - Beaver Meadow Road, Haddam, Middlesex County, Connecticut, USA
2.7km (1.7 miles) Gillette Quarry (J-J Mine; Haddam Neck Quarry), Haddam Neck, Haddam, Middlesex County, Connecticut, USA
12.3km (7.6 miles) Linkpot cut, Airline Railroad, East Hampton, Middlesex County, Connecticut, USA
14.7km (9.1 miles) Strickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
24.3km (15.1 miles) MacCurdy Quarry, Old Lyme, New London County, Connecticut, USA
27.3km (17.0 miles) Stony Creek Quarry (Norcross Granite Gneiss Rock Quarries; Castellucci Quarry), Branford, New Haven County, Connecticut, USA
33.5km (20.8 miles) Flatrock Quarry (Flat Rock Quarry; Crystal Mall), Waterford, New London County, Connecticut, USA
51.8km (32.2 miles) Thomaston Dam railroad cut, Thomaston Dam, Thomaston, Litchfield County, Connecticut, USA
References
 
and/or  
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