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
Ward Creek [1], Cazadero, Coast Range, Sonoma County, California, USA


Locality type:Creek
Classification
Species:Actinolite
Formula:◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Comments:From metasediments.
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Glaucophane2
Data
Mineral Data:Click here to view Actinolite data
Locality Data:Click here to view Ward Creek [1], Cazadero, Coast Range, Sonoma County, California, USA
Data Identifiers
Mindat Occurrence Record ID:217478
Long-form Identifier:1:3:217478:5
GUID (UUID V4):0
Nearest other occurrences of Actinolite
1.6km (1.0 miles) ⓘWard Creek [2], Cazadero, Coast Range, Sonoma County, California, USA
17.4km (10.8 miles) ⓘCamp Meeker, Coast Range, Sonoma County, California, USA
38.8km (24.1 miles) ⓘRosenhahnite occurrence, Russian River, Cloverdale area, Mendocino County, California, USA
87.9km (54.6 miles) ⓘReed Station, Tiburon Peninsula, Marin County, California, USA
91.9km (57.1 miles) ⓘSausalito harbor area, Sausalito, Marin County, California, USA
References
 
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