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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Cyrtolite from
Walden Gem Quarry, Portland, Middlesex County, Connecticut, USA


Locality type:Quarry
Classification
Species:Zircon var: Cyrtolite
Formula:Zr[(SiO4),(OH)4]
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Cyrtolite data
Locality Data:Click here to view Walden Gem Quarry, Portland, Middlesex County, Connecticut, USA
Data Identifiers
Mindat Occurrence Record ID:657266
Long-form Identifier:1:3:657266:2
GUID (UUID V4):0
Nearest other occurrences of Cyrtolite
1.2km (0.7 miles) ⓘHale Quarry (Andrews Quarry; Glastonbury Quarry), Portland, Middlesex County, Connecticut, USA
1.4km (0.9 miles) ⓘAndrews Quarry (old Hale Quarry; Grandfather Andrews Quarry), Portland, Middlesex County, Connecticut, USA
1.5km (0.9 miles) ⓘCase Quarries, Portland, Middlesex County, Connecticut, USA
2.4km (1.5 miles) ⓘSimpson Quarry (Wiarda Quarry), South Glastonbury, Glastonbury, Hartford County, Connecticut, USA
2.5km (1.6 miles) ⓘPelton's Quarry, Portland, Middlesex County, Connecticut, USA
3.0km (1.8 miles) ⓘStrickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
6.1km (3.8 miles) ⓘState Forest Quarry No. 2, Cobalt, East Hampton, Middlesex County, Connecticut, USA
9.6km (6.0 miles) ⓘTollgate Quarry (Tollgate Mine; Bidwell Quarry; China-stone Quarry), Middletown, Middlesex County, Connecticut, USA
11.4km (7.1 miles) ⓘWorth and Selden Quarries (Victoria Quarry), East Hampton, Middlesex County, Connecticut, USA
14.2km (8.8 miles) ⓘSlocum prospect, East Hampton, Middlesex County, Connecticut, USA
References
Rocks & Minerals (1970) 45:595-600
 
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