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
Indiana Mine, Winona, Greenland Township, Ontonagon County, Michigan, USA


Locality type:Mine
Classification
Species:Actinolite
Formula:◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
Associated Minerals Based on Photo Data:
Andradite2
Epidote2
Calcite1
Data
Mineral Data:Click here to view Actinolite data
Locality Data:Click here to view Indiana Mine, Winona, Greenland Township, Ontonagon County, Michigan, USA
Data Identifiers
Mindat Occurrence Record ID:866005
Long-form Identifier:1:3:866005:3
GUID (UUID V4):0
Nearest other occurrences of Actinolite
23.2km (14.4 miles) ⓘEcho Lake Intrusion, Ontonagon County, Michigan, USA
68.4km (42.5 miles) ⓘTitan Mine, Baraga County, Michigan, USA
68.8km (42.7 miles) ⓘBeaufort Mine (Northrup), Baraga County, Michigan, USA
69.5km (43.2 miles) ⓘOhio Mines (Imperial Mine; Webster Mine), Imperial Heights, Baraga County, Michigan, USA
69.5km (43.2 miles) ⓘNorwood Mine, Imperial Heights, Baraga County, Michigan, USA
70.6km (43.8 miles) ⓘSteward Mine (Orleans), Imperial Heights, Baraga County, Michigan, USA
71.0km (44.1 miles) ⓘPortland Mine, Imperial Heights, Baraga County, Michigan, USA
72.0km (44.7 miles) ⓘSpurr Mine, Imperial Heights, Baraga County, Michigan, USA
74.6km (46.4 miles) ⓘMichigamme Mine, Michigamme, Michigamme Township, Marquette County, Michigan, USA
78.8km (49.0 miles) ⓘMagnetic Mine, Republic, Republic Township, Marquette County, Michigan, USA
References
Travis Olds collection
 
and/or  
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