Coticule
A rock subtype
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About Coticule
A low-grade very-fine-grained metamorphic rock consisting of spessartine in a matrix of white mica and +/- submicroscopic quartz.
See also gondite.
The stone is used as a whetstone to sharpen tools and chisels.
See also gondite.
The stone is used as a whetstone to sharpen tools and chisels.
Unique Identifiers
Mindat ID:
51294
Long-form identifier:
mindat:1:1:51294:5
Classification of Coticule
Mineralogy of Coticule
Essential minerals - these are minerals that are required within the classification of this rock:
| Spessartine | Mn2+3Al2(SiO4)3 |
| White mica | An informal field name for any mica with a very pale colour, in contrast to dark micas like the biotites. |
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
Common Associates
Associations Based on Photo Data:
| 2 photos of Coticule associated with 'Phyllite' |
Internet Links for Coticule
mindat.org URL:
https://www.mindat.org/min-51294.html
Please feel free to link to this page.
Please feel free to link to this page.
References for Coticule
Reference List:
Kramm, Ulrich (1976) The coticule rocks (spessartine quartzites) of the Venn-Stavelot Massif, Ardennes, a volcanoclastic Metasediment? Contributions to Mineralogy and Petrology, 56 (2). p.135-155. doi:10.1007/bf00399600
Localities for Coticule
Showing 18 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Belgium | |
| Hatert et al. (2014) |
| Hatert et al. (2002) |
| Depret et al. (2024) | |
| Hatert et al. (2002) +1 other reference |
| Anten (1912) |
| Anten (1912) | |
| Mélon et al. (1976) +1 other reference |
| Hatert et al. (2002) +1 other reference | |
| Hatert et al. (2002) | |
| Theunissen (1970) |
| Hatert et al. (2002) +1 other reference | |
| Hatert et al. (2002) | |
| Depret et al. (2024) | |
Canada | |
| Blein et al. (2025) |
Greece | |
| Schumacher et al. (2008) |
Ireland | |
| Barros et al. (2022) |
Namibia | |
| Gauert (2005) |
South Africa | |
| Rudnick et al. (2013) |
Thier del Preu quarry, Petit-Sart, Lierneux, Liège, Wallonia, Belgium