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
Strickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA


Locality type:Quarry
Classification
Species:Diopside
Formula:CaMgSi2O6
Comments:Common in calc-silicate units in the host Collins Hill Formation intergrown with actinolite and grossular.
Habit:massive
Colour:light green
Quality for species:Poor for species, only of interest for locality collectors. (#)
Abundance at site:Common
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
Data
Mineral Data:Click here to view Diopside data
Locality Data:Click here to view Strickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
Data Identifiers
Mindat Occurrence Record ID:96194
Long-form Identifier:1:3:96194:1
GUID (UUID V4):0
Nearest other occurrences of Diopside
0.1km (0.1 miles) ⓘSchoonmaker Mine, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
0.7km (0.5 miles) ⓘCarr Brook Waterfall, Collins Hill, Portland, Middlesex County, Connecticut, USA
3.8km (2.4 miles) ⓘGreat Hill cobalt mines, Cobalt, East Hampton, Middlesex County, Connecticut, USA
4.3km (2.7 miles) ⓘWhite Rocks Quarry (Consolidated Quarry), White Rock Mining District, Middletown, Middlesex County, Connecticut, USA
4.4km (2.7 miles) ⓘWhite Rock Mining District, Middletown, Middlesex County, Connecticut, USA
6.8km (4.2 miles) ⓘTollgate Quarry (Tollgate Mine; Bidwell Quarry; China-stone Quarry), Middletown, Middlesex County, Connecticut, USA
10.2km (6.3 miles) ⓘState Route 2 roadcut, Marlborough, Hartford County, Connecticut, USA
10.2km (6.4 miles) ⓘAnderson No. 1 Mica Mine, East Hampton, Middlesex County, Connecticut, USA
12.0km (7.5 miles) ⓘSlocum prospect, East Hampton, Middlesex County, Connecticut, USA
13.0km (8.1 miles) ⓘGillette Quarry (J-J Mine; Haddam Neck Quarry), Haddam Neck, Haddam, Middlesex 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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