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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Diopside from
State Route 9 rock cuts, Haddam, Middlesex County, Connecticut, USA


Classification
Species:Diopside
Formula:CaMgSi2O6
Habit:anhedral
Quality for species:Rock forming mineral/non-crystalline/little interest for collectors.(##)
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
Data
Mineral Data:Click here to view Diopside data
Locality Data:Click here to view State Route 9 rock cuts, Haddam, Middlesex County, Connecticut, USA
Data Identifiers
Mindat Occurrence Record ID:920663
Long-form Identifier:1:3:920663:2
GUID (UUID V4):0
Nearest other occurrences of Diopside
1.1km (0.7 miles) ⓘHewitt Gem Quarry (Herb's Gem Quarry; Sawmill Quarry), Haddam, Middlesex County, Connecticut, USA
3.4km (2.1 miles) ⓘHazen quarry (Epidote locality), Haddam, Middlesex County, Connecticut, USA
5.2km (3.3 miles) ⓘGillette Quarry (J-J Mine; Haddam Neck Quarry), Haddam Neck, Haddam, Middlesex County, Connecticut, USA
7.8km (4.9 miles) ⓘAnderson No. 1 Mica Mine, East Hampton, Middlesex County, Connecticut, USA
10.4km (6.5 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
13.4km (8.3 miles) ⓘWhite Rock Mining District, Middletown, Middlesex County, Connecticut, USA
13.7km (8.5 miles) ⓘWhite Rocks Quarry (Consolidated Quarry), White Rock Mining District, Middletown, Middlesex County, Connecticut, USA
14.9km (9.2 miles) ⓘGreat Hill cobalt mines, Cobalt, East Hampton, Middlesex County, Connecticut, USA
17.3km (10.7 miles) ⓘStrickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
References
Lundgren, Lawrence Jr. (1979) The Bedrock Geology of the Haddam Quadrangle. Quadrangle Report 37.. State Geological and Natural History Survey of Connecticutp.37
 
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