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
Chrysoberyl locality, Haddam, Middlesex County, Connecticut, USA


Locality type:Outcrop
Classification
Species:Albite var: Oligoclase
Formula:(Na,Ca)[Al(Si,Al)Si2O8]
Habit:anhedral, cleavable, massive
Colour:white, blue opalescence
Quality for species:Rock forming mineral/non-crystalline/little interest for collectors.(##)
Abundance at site:Extremely common
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Oligoclase data
Locality Data:Click here to view Chrysoberyl locality, Haddam, Middlesex County, Connecticut, USA
Data Identifiers
Mindat Occurrence Record ID:660303
Long-form Identifier:1:3:660303:8
GUID (UUID V4):0
Nearest other occurrences of Oligoclase
0.3km (0.2 miles) ⓘHill above the parsonage (unnamed feldspar quarry), Haddam, Middlesex County, Connecticut, USA
1.4km (0.9 miles) ⓘTimms Hill (Tim's Hill; Iolite Hill), Haddam, Middlesex County, Connecticut, USA
1.5km (0.9 miles) ⓘGillette Quarry (J-J Mine; Haddam Neck Quarry), Haddam Neck, Haddam, Middlesex County, Connecticut, USA
3.0km (1.8 miles) ⓘState Route 9 Interchange 13 - Beaver Meadow Road, Haddam, Middlesex County, Connecticut, USA
10.9km (6.8 miles) ⓘLinkpot cut, Airline Railroad, East Hampton, Middlesex County, Connecticut, USA
13.4km (8.4 miles) ⓘStrickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
25.3km (15.7 miles) ⓘMacCurdy Quarry, Old Lyme, New London County, Connecticut, USA
28.5km (17.7 miles) ⓘStony Creek Quarry (Norcross Granite Gneiss Rock Quarries; Castellucci Quarry), Branford, New Haven County, Connecticut, USA
33.8km (21.0 miles) ⓘFlatrock Quarry (Flat Rock Quarry; Crystal Mall), Waterford, New London County, Connecticut, USA
51.3km (31.8 miles) ⓘThomaston Dam railroad cut, Thomaston Dam, Thomaston, Litchfield County, Connecticut, USA
References
Schooner, Richard. (1958) THE MINERALOGY OF THE PORTLAND-EAST HAMPTON-MIDDLETOWN-HADDAM AREA IN CONNECTICUT (With a few notes on Glastonbury and Marlborough)
 
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