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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Sillimanite from
Radersberg quarry, Dreis-Brück, Daun, Vulkaneifel, Rhineland-Palatinate, Germany


00199830017369900181803.jpg
Sillimanite, etc.

Radersberg quarry, Dreis-Brück, Daun, Vulkaneifel, Rhineland-Palatinate, Germany
00199830017369900181803.jpg
Sillimanite, etc.

Radersberg quarry, Dreis-Brück, Daun, Vulkaneifel, Rhineland-Palatinate, Germany
05650830017369900189683.jpg
Sillimanite, etc.

Radersberg quarry, Dreis-Brück, Daun, Vulkaneifel, Rhineland-Palatinate, Germany
Locality type:Quarry
Classification
Species:Sillimanite
Formula:Al2(SiO4)O
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Corundum3
Quartz2
Data
Mineral Data:Click here to view Sillimanite data
Locality Data:Click here to view Radersberg quarry, Dreis-Brück, Daun, Vulkaneifel, Rhineland-Palatinate, Germany
Data Identifiers
Mindat Occurrence Record ID:85223
Long-form Identifier:1:3:85223:6
GUID (UUID V4):0
Nearest other occurrences of Sillimanite
8.9km (5.6 miles) ⓘBocksberg, Müllenbach, Adenau, Ahrweiler, Rhineland-Palatinate, Germany
9.7km (6.0 miles) ⓘAuf Dickel (incl. Nonnental), Rockeskyll volcanic complex, Rockeskyll, Gerolstein, Vulkaneifel, Rhineland-Palatinate, Germany
13.9km (8.7 miles) ⓘEmmelberg, Üdersdorf, Daun, Vulkaneifel, Rhineland-Palatinate, Germany
19.5km (12.1 miles) ⓘHochbermel, Bermel, Vordereifel, Mayen-Koblenz, Rhineland-Palatinate, Germany
20.1km (12.5 miles) ⓘWartgesberg, Strohn, Daun, Vulkaneifel, Rhineland-Palatinate, Germany
30.6km (19.0 miles) ⓘCaspar quarry, Ettringen, Vordereifel, Mayen-Koblenz, Rhineland-Palatinate, Germany
30.6km (19.0 miles) ⓘKappiger Ley (Kappiger Lay), Wehr, Brohltal, Ahrweiler, Rhineland-Palatinate, Germany
32.6km (20.2 miles) ⓘRothenberg Quarry, Bell, Mendig, Mayen-Koblenz, Rhineland-Palatinate, Germany
33.6km (20.9 miles) ⓘHüttenberg sand pit, Glees, Brohltal, Ahrweiler, Rhineland-Palatinate, Germany
33.9km (21.0 miles) ⓘThelenberg, Mendig, Mendig, Mayen-Koblenz, Rhineland-Palatinate, Germany
References
Aufschluss 79(3), 69-73
 
and/or  
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