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
Hewitt Gem Quarry (Herb's Gem Quarry; Sawmill Quarry), Haddam, Middlesex County, Connecticut, USA


Locality type:Quarry
Classification
Species:Zircon var: Cyrtolite
Formula:Zr[(SiO4),(OH)4]
Comments:Tiny crystals usually in the aplitic zone.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Cyrtolite data
Locality Data:Click here to view Hewitt Gem Quarry (Herb's Gem Quarry; Sawmill Quarry), Haddam, Middlesex County, Connecticut, USA
Data Identifiers
Mindat Occurrence Record ID:689502
Long-form Identifier:1:3:689502:0
GUID (UUID V4):0
Nearest other occurrences of Cyrtolite
8.7km (5.4 miles) ⓘWorth and Selden Quarries (Victoria Quarry), East Hampton, Middlesex County, Connecticut, USA
9.4km (5.9 miles) ⓘSlocum prospect, East Hampton, Middlesex County, Connecticut, USA
12.2km (7.6 miles) ⓘTollgate Quarry (Tollgate Mine; Bidwell Quarry; China-stone Quarry), Middletown, Middlesex County, Connecticut, USA
14.0km (8.7 miles) ⓘState Forest Quarry No. 2, Cobalt, East Hampton, Middlesex County, Connecticut, USA
16.9km (10.5 miles) ⓘStrickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
17.4km (10.8 miles) ⓘPelton's Quarry, Portland, Middlesex County, Connecticut, USA
19.8km (12.3 miles) ⓘWalden Gem Quarry, Portland, Middlesex County, Connecticut, USA
20.0km (12.4 miles) ⓘCase Quarries, Portland, Middlesex County, Connecticut, USA
20.9km (13.0 miles) ⓘHale Quarry (Andrews Quarry; Glastonbury Quarry), Portland, Middlesex County, Connecticut, USA
21.2km (13.2 miles) ⓘAndrews Quarry (old Hale Quarry; Grandfather Andrews Quarry), Portland, Middlesex County, Connecticut, USA
References
Shelton, William. (1967): Notes on a Find at Haddam. Rocks and Minerals: 42(7): 502-503.
 
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