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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Calcite from
Schoonmaker Mine, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA


Locality type:Mine
Classification
Species:Calcite
Formula:CaCO3
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Pyrite1
Data
Mineral Data:Click here to view Calcite data
Locality Data:Click here to view Schoonmaker Mine, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
Data Identifiers
Mindat Occurrence Record ID:612294
Long-form Identifier:1:3:612294:2
GUID (UUID V4):0
Nearest other occurrences of Calcite
0.1km (0.1 miles) ⓘStrickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
0.6km (0.4 miles) ⓘCarr Brook Waterfall, Collins Hill, Portland, Middlesex County, Connecticut, USA
4.1km (2.6 miles) ⓘMiddletown lead mines (Middletown Mine), Middletown, Middlesex County, Connecticut, USA
6.9km (4.3 miles) ⓘTollgate Quarry (Tollgate Mine; Bidwell Quarry; China-stone Quarry), Middletown, Middlesex County, Connecticut, USA
9.7km (6.0 miles) ⓘRocky Hill Quarry, Rocky Hill, Hartford County, Connecticut, USA
11.0km (6.9 miles) ⓘInterstate 91 and Interstate 291 interchange, Wethersfield, Hartford County, Connecticut, USA
12.5km (7.8 miles) ⓘState Routes 9 and 372 interchange, Berlin, Hartford County, Connecticut, USA
13.1km (8.1 miles) ⓘGillette Quarry (J-J Mine; Haddam Neck Quarry), Haddam Neck, Haddam, Middlesex County, Connecticut, USA
13.9km (8.6 miles) ⓘState Route 9 and State Route 81 Interchange, Higganum, Haddam, Middlesex County, Connecticut, USA
14.0km (8.7 miles) ⓘHawthorne Drive, Berlin, Hartford County, Connecticut, USA
References
Schooner, Richard (1955) 90 Minerals from 1 Connecticut Hill. Rocks & Minerals, 30 (7-8). 351-358 doi:10.1080/00357529.1955.11767837
 
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