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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Tobermorite from
Arensberg, Zilsdorf, Walsdorf, Gerolstein, Vulkaneifel, Rhineland-Palatinate, Germany


08129260017272741007732.jpg
Tobermorite

Arensberg, Zilsdorf, Walsdorf, Gerolstein, Vulkaneifel, Rhineland-Palatinate, Germany
09432550017272023225504.jpg
Tobermorite, etc.

Arensberg, Zilsdorf, Walsdorf, Gerolstein, Vulkaneifel, Rhineland-Palatinate, Germany
04402660017366256023457.jpg
Tobermorite, etc.

Arensberg, Zilsdorf, Walsdorf, Gerolstein, Vulkaneifel, Rhineland-Palatinate, Germany
01576170017795254246150.jpg
Tobermorite, etc.

Arensberg, Zilsdorf, Walsdorf, Gerolstein, Vulkaneifel, Rhineland-Palatinate, Germany
07183320017369769286117.jpg
Tobermorite

Arensberg, Zilsdorf, Walsdorf, Gerolstein, Vulkaneifel, Rhineland-Palatinate, Germany
08449300017369769288474.jpg
Tobermorite, etc.

Arensberg, Zilsdorf, Walsdorf, Gerolstein, Vulkaneifel, Rhineland-Palatinate, Germany
05206810017366255806003.jpg
Tobermorite, etc.

Arensberg, Zilsdorf, Walsdorf, Gerolstein, Vulkaneifel, Rhineland-Palatinate, Germany
07227950017758136205178.jpg
Tobermorite, etc.

Arensberg, Zilsdorf, Walsdorf, Gerolstein, Vulkaneifel, Rhineland-Palatinate, Germany
08129260017272741007732.jpg
Tobermorite

Arensberg, Zilsdorf, Walsdorf, Gerolstein, Vulkaneifel, Rhineland-Palatinate, Germany
09432550017272023225504.jpg
Tobermorite, etc.

Arensberg, Zilsdorf, Walsdorf, Gerolstein, Vulkaneifel, Rhineland-Palatinate, Germany
08799050017369070038192.jpg
Tobermorite, etc.

Arensberg, Zilsdorf, Walsdorf, Gerolstein, Vulkaneifel, Rhineland-Palatinate, Germany
01576170017795254246150.jpg
Tobermorite, etc.

Arensberg, Zilsdorf, Walsdorf, Gerolstein, Vulkaneifel, Rhineland-Palatinate, Germany
Locality type:Quarry
Classification
Species:Tobermorite
Formula:Ca5Si6O17 · 5H2O
Habit:fine-grained masses looking like wads of cotton wool when fresh
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Gismondine-Ca8
Phillipsite Subgroup7
Natrolite3
Thomsonite-Ca2
Thaumasite1
Apophyllite Group1
Gyrolite1
Natrolite Subgroup1
Data
Mineral Data:Click here to view Tobermorite data
Locality Data:Click here to view Arensberg, Zilsdorf, Walsdorf, Gerolstein, Vulkaneifel, Rhineland-Palatinate, Germany
Photo GalleryView Gallery (8 photos)
Data Identifiers
Mindat Occurrence Record ID:29304
Long-form Identifier:1:3:29304:4
GUID (UUID V4):0
Nearest other occurrences of Tobermorite
10.6km (6.6 miles) ⓘBurgkopf, Hoffeld, Adenau, Ahrweiler, Rhineland-Palatinate, Germany
16.4km (10.2 miles) ⓘEmmelberg, Üdersdorf, Daun, Vulkaneifel, Rhineland-Palatinate, Germany
36.4km (22.6 miles) ⓘCaspar quarry, Ettringen, Vordereifel, Mayen-Koblenz, Rhineland-Palatinate, Germany
36.4km (22.6 miles) ⓘMayener Feld, Mayen, Mayen-Koblenz, Rhineland-Palatinate, Germany
36.7km (22.8 miles) ⓘHufnagel, Kottenheim, Vordereifel, Mayen-Koblenz, Rhineland-Palatinate, Germany
37.0km (23.0 miles) ⓘXenolith CS-020, Seekante, Mayen, Mayen-Koblenz, Rhineland-Palatinate, Germany
37.0km (23.0 miles) ⓘXenolith CS-008 (Bellbergite type-locality), Seekante, Mayen, Mayen-Koblenz, Rhineland-Palatinate, Germany
37.8km (23.5 miles) ⓘRothenberg Quarry, Bell, Mendig, Mayen-Koblenz, Rhineland-Palatinate, Germany
References
Hentschel, G. (1973) Begleitmineralien des Basaltes vom Arensberg bei Zilsdorf, Eifel. Notizbl. hess. L.-Amt Bodenforsch. 101, 310-316.
Doornveld, H.Y. (1987) Enkele mineraalvoorkomens in de Eifel. GEA, 20 (1), 32-36 (in Dutch).
 
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