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
Jail Hill Road locality (Jail Hill Quarry), Haddam, Middlesex County, Connecticut, USA


Classification
Species:Calcite
Formula:CaCO3
Comments:Minor accessory in the Mn deposit.
Habit:anhedral
Colour:white
Quality for species:Rock forming mineral/non-crystalline/little interest for collectors.(##)
Abundance at site:Very Rare
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
Associated Minerals Based on Photo Data:
Spessartine2
Pyroxmangite1
Tephroite1
Pyrophanite1
Data
Mineral Data:Click here to view Calcite data
Locality Data:Click here to view Jail Hill Road locality (Jail Hill Quarry), Haddam, Middlesex County, Connecticut, USA
Data Identifiers
Mindat Occurrence Record ID:706196
Long-form Identifier:1:3:706196:7
GUID (UUID V4):0
Nearest other occurrences of Calcite
1.0km (0.6 miles) ⓘHazen quarry (Epidote locality), Haddam, Middlesex County, Connecticut, USA
2.4km (1.5 miles) ⓘGillette Quarry (J-J Mine; Haddam Neck Quarry), Haddam Neck, Haddam, Middlesex County, Connecticut, USA
2.9km (1.8 miles) ⓘState Route 9 rock cuts, Haddam, Middlesex County, Connecticut, USA
3.7km (2.3 miles) ⓘState Route 9 and State Route 81 Interchange, Higganum, Haddam, Middlesex County, Connecticut, USA
10.7km (6.6 miles) ⓘTollgate Quarry (Tollgate Mine; Bidwell Quarry; China-stone Quarry), Middletown, Middlesex County, Connecticut, USA
12.8km (8.0 miles) ⓘMiddletown lead mines (Middletown Mine), Middletown, Middlesex County, Connecticut, USA
15.0km (9.3 miles) ⓘStrickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
15.1km (9.4 miles) ⓘSchoonmaker Mine, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
15.1km (9.4 miles) ⓘJoshua Rock Quarry, Lyme, New London County, Connecticut, USA
15.7km (9.8 miles) ⓘCarr Brook Waterfall, Collins Hill, Portland, Middlesex County, Connecticut, USA
References
Moritz, Harold (n.d.) Personal Communication.
 
and/or  
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