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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Actinolite from
Carr Brook Waterfall, Collins Hill, Portland, Middlesex County, Connecticut, USA


Locality type:Waterfall
Classification
Species:Actinolite
Formula:◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Diopside2
Epidote2
Titanite1
Data
Mineral Data:Click here to view Actinolite data
Locality Data:Click here to view Carr Brook Waterfall, Collins Hill, Portland, Middlesex County, Connecticut, USA
Data Identifiers
Mindat Occurrence Record ID:612303
Long-form Identifier:1:3:612303:1
GUID (UUID V4):0
Nearest other occurrences of Actinolite
0.6km (0.4 miles) ⓘSchoonmaker Mine, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
0.7km (0.5 miles) ⓘStrickland Quarry, Strickland pegmatite, Collins Hill, Portland, Middlesex County, Connecticut, USA
4.3km (2.7 miles) ⓘGreat Hill cobalt mines, Cobalt, East Hampton, Middlesex County, Connecticut, USA
5.0km (3.1 miles) ⓘWhite Rocks Quarry (Consolidated Quarry), White Rock Mining District, Middletown, Middlesex County, Connecticut, USA
5.1km (3.2 miles) ⓘWhite Rock Mining District, Middletown, Middlesex County, Connecticut, USA
7.5km (4.6 miles) ⓘTollgate Quarry (Tollgate Mine; Bidwell Quarry; China-stone Quarry), Middletown, Middlesex County, Connecticut, USA
9.4km (5.8 miles) ⓘWorth and Selden Quarries (Victoria Quarry), East Hampton, Middlesex County, Connecticut, USA
10.9km (6.8 miles) ⓘAnderson No. 1 Mica Mine, East Hampton, Middlesex County, Connecticut, USA
12.6km (7.8 miles) ⓘSlocum prospect, East Hampton, Middlesex County, Connecticut, USA
13.5km (8.4 miles) ⓘThulite locality, 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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