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
Björsta mine, Östhammar, Uppsala County, Sweden


Locality type:Mine
Classification
Species:Actinolite
Formula:◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Actinolite data
Locality Data:Click here to view Björsta mine, Östhammar, Uppsala County, Sweden
Data Identifiers
Mindat Occurrence Record ID:217261
Long-form Identifier:1:3:217261:3
GUID (UUID V4):0
Nearest other occurrences of Actinolite
6.4km (3.9 miles) ⓘGammelbyn, Östhammar, Uppsala County, Sweden
7.1km (4.4 miles) ⓘJakob Edbergh's mine, Barkö mines, Östhammar, Uppsala County, Sweden
7.2km (4.4 miles) ⓘBarkö mines, Östhammar, Uppsala County, Sweden
17.3km (10.7 miles) ⓘVigelsbo Mines, Östhammar, Uppsala County, Sweden
21.8km (13.6 miles) ⓘHerräng ore field, Norrtälje, Stockholm County, Sweden
23.3km (14.5 miles) ⓘDannemora Mine, Dannemora, Östhammar, Uppsala County, Sweden
89.5km (55.6 miles) ⓘKapten mine, Årsunda, Sandviken, Gävleborg County, Sweden
93.6km (58.2 miles) ⓘSpringargruvan, Sala Municipality, Västmanland County, Sweden
References
 
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