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
Gelbe Birke Mine, Beierfeld, Grünhain-Beierfeld, Erzgebirgskreis, Saxony, Germany


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 Gelbe Birke Mine, Beierfeld, Grünhain-Beierfeld, Erzgebirgskreis, Saxony, Germany
Data Identifiers
Mindat Occurrence Record ID:77825
Long-form Identifier:1:3:77825:3
GUID (UUID V4):0
Nearest other occurrences of Actinolite
0.9km (0.5 miles) ⓘFrisch Glück Mine (Herkules-Frisch Glück Mine), Fürstenberg hill, Waschleithe, Grünhain-Beierfeld, Erzgebirgskreis, Saxony, Germany
1.0km (0.6 miles) ⓘGraul, Langenberg, Raschau-Markersbach, Erzgebirgskreis, Saxony, Germany
6.1km (3.8 miles) ⓘShaft 235 (Weißer Hirsch mine), Crandorf, Schwarzenberg, Erzgebirgskreis, Saxony, Germany
6.5km (4.0 miles) ⓘUnverhofft Glück an der Achte Mine, Antonsthal, Breitenbrunn, Erzgebirgskreis, Saxony, Germany
6.6km (4.1 miles) ⓘPöhla-Tellerhäuser Mine, Pöhla, Schwarzenberg, Erzgebirgskreis, Saxony, Germany
8.3km (5.2 miles) ⓘFällbach Shaft, Antonsthal, Breitenbrunn, Erzgebirgskreis, Saxony, Germany
9.2km (5.7 miles) ⓘSt. Margarethe Mine (Otto-Stollen; Shaft 23), Breitenbrunn, Erzgebirgskreis, Saxony, Germany
9.5km (5.9 miles) ⓘGeyer SW skarn, Geyer, Erzgebirgskreis, Saxony, Germany
11.7km (7.3 miles) ⓘShaft 38, Niederschlema, Bad Schlema, Aue-Bad Schlema, Erzgebirgskreis, Saxony, Germany
12.6km (7.8 miles) ⓘShaft 309, Niederschlema, Bad Schlema, Aue-Bad Schlema, Erzgebirgskreis, Saxony, Germany
References
Schlegel, Peter (1991) Die Mineralien der Grube 'Gelbe Birke' bei Schwarzenberg in Sachsen [The minerals of the 'Gelbe Birke' mine near Schwarzenberg in Saxony]. Lapis, 16 (6). 13-20; 58
 
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