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Thier del Preu quarry, Petit-Sart, Lierneux, Liège, Wallonia, Belgiumi
Regional Level Types
Thier del Preu quarryQuarry (Active)
Petit-SartVillage
LierneuxMunicipality
LiègeProvince
WalloniaRegion
BelgiumCountry
Thier del Preu quarry, Stavelot Massif, Rhenish Massif, Europe
Thier del Preu quarry, Ardennes Mountains, Europe

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PhotosMapsSearch
08086640017272244735086.jpg
Thier del Preu quarry

Thier del Preu quarry, Petit-Sart, Lierneux, Liège, Wallonia, Belgium
04616670017272244744462.jpg
Thier del Preu

Thier del Preu quarry, Petit-Sart, Lierneux, Liège, Wallonia, Belgium
06511280017550999698894.jpg
Thier-del-Preu Est view.

Thier del Preu quarry, Petit-Sart, Lierneux, Liège, Wallonia, Belgium
08086640017272244735086.jpg
Thier del Preu quarry

Thier del Preu quarry, Petit-Sart, Lierneux, Liège, Wallonia, Belgium
04616670017272244744462.jpg
Thier del Preu

Thier del Preu quarry, Petit-Sart, Lierneux, Liège, Wallonia, Belgium
06511280017550999698894.jpg
Thier-del-Preu Est view.

Thier del Preu quarry, Petit-Sart, Lierneux, Liège, Wallonia, Belgium
02554450017272244755608.jpg
Thier del Preu quarry

Thier del Preu quarry, Petit-Sart, Lierneux, Liège, Wallonia, Belgium
09765910017272244753408.jpg
Thier del Preu

Thier del Preu quarry, Petit-Sart, Lierneux, Liège, Wallonia, Belgium
Latitude & Longitude (WGS84):
50° 16' 45'' North , 5° 50' 26'' East
Latitude & Longitude (decimal):
50.27917,5.84056
GRN:
N34E03
Type:
Quarry (Active) - last checked 2026
Köppen climate type:
Cfb : Temperate oceanic climate
Nearest Settlements:
PlacePopulationDistance
Lierneux3,332 (2012)3.5km
Vielsalm7,291 (2012)5.3km
Trois-Ponts2,533 (2011)10.5km
Manhay3,128 (2012)11.8km
Gouvy4,706 (2012)12.5km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Vieille Montagne HeritageKelmis / La Calamine, Belgium49km
Mindat Locality ID:
107899
Long-form identifier:
mindat:1:2:107899:5
GUID (UUID V4):
0
Other/historical names associated with this locality:
Thier del Preux; Tiers del Preu
Name(s) in local language(s):
Carrière du Thier del Preu (Thier del Preux; Tiers del Preu), Petit-Sart, Lierneux, Vallee de la Lienne, Massif de Stavelot, Province de Liège, Belgique


The quarry operated by the "Ardennes Coticule" company is the last place in the region still extracting coticule. Used for ages as a whetstone or sharpening stone, coticule from the Lierneux-Vielsalm area has been exported worldwide. This metamorphic quartzitic rock gets its abrasive quality from microscopic spessartine garnets.

Note on the mineral list: The andalusite found here has a greenish tint due to the presence of manganese (see also viridine).

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


15 valid minerals.

Rock Types Recorded


Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Anatase
Formula: TiO2
ⓘ Andalusite
Formula: Al2(SiO4)O
Colour: Green.
Description: Color due to presence of Mn.
ⓘ 'Apatite'
Formula: Ca5(PO4)3A
ⓘ Ardennite-(As)
Formula: Mn2+4Al4(AlMg)(AsO4)(SiO4)2(Si3O10)(OH)6
ⓘ Braunite
Formula: Mn2+Mn3+6(SiO4)O8
ⓘ Clinochlore
Formula: Mg5Al(AlSi3O10)(OH)8
ⓘ Cryptomelane
Formula: K(Mn4+7Mn3+)O16
ⓘ Hematite
Formula: Fe2O3
ⓘ Lithiophorite
Formula: (Al,Li)MnO2(OH)2
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Pyrophyllite
Formula: Al2Si4O10(OH)2
ⓘ Quartz
Formula: SiO2
ⓘ Spessartine
Formula: Mn2+3Al2(SiO4)3
ⓘ Sudoite
Formula: Mg2Al3(AlSi3O10)(OH)8
ⓘ Turquoise
Formula: CuAl6(PO4)4(OH)8 · 4H2O
ⓘ Wavellite
Formula: Al3(PO4)2(OH)3 · 5H2O

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘHematite4.CB.05Fe2O3
ⓘQuartz4.DA.05SiO2
ⓘAnatase4.DD.05TiO2
ⓘCryptomelane4.DK.05aK(Mn4+7Mn3+)O16
ⓘLithiophorite4.FE.25(Al,Li)MnO2(OH)2
Group 8 - Phosphates, Arsenates and Vanadates
ⓘWavellite8.DC.50Al3(PO4)2(OH)3 · 5H2O
ⓘTurquoise8.DD.15CuAl6(PO4)4(OH)8 · 4H2O
Group 9 - Silicates
ⓘSpessartine9.AD.25Mn2+3Al2(SiO4)3
ⓘAndalusite9.AF.10Al2(SiO4)O
ⓘBraunite9.AG.05Mn2+Mn3+6(SiO4)O8
ⓘArdennite-(As)9.BJ.40Mn2+4Al4(AlMg)(AsO4)(SiO4)2(Si3O10)(OH)6
ⓘPyrophyllite9.EC.10Al2Si4O10(OH)2
ⓘMuscovite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘClinochlore9.EC.55Mg5Al(AlSi3O10)(OH)8
ⓘSudoite9.EC.55Mg2Al3(AlSi3O10)(OH)8
Unclassified
ⓘ'Apatite'-Ca5(PO4)3A

List of minerals for each chemical element

HHydrogen
Hⓘ Ardennite-(As)Mn42+Al4(AlMg)(AsO4)(SiO4)2(Si3O10)(OH)6
Hⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Hⓘ Lithiophorite(Al,Li)MnO2(OH)2
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ PyrophylliteAl2Si4O10(OH)2
Hⓘ SudoiteMg2Al3(AlSi3O10)(OH)8
Hⓘ TurquoiseCuAl6(PO4)4(OH)8 · 4H2O
Hⓘ WavelliteAl3(PO4)2(OH)3 · 5H2O
LiLithium
Liⓘ Lithiophorite(Al,Li)MnO2(OH)2
OOxygen
Oⓘ AnataseTiO2
Oⓘ AndalusiteAl2(SiO4)O
Oⓘ Ardennite-(As)Mn42+Al4(AlMg)(AsO4)(SiO4)2(Si3O10)(OH)6
Oⓘ BrauniteMn2+Mn63+(SiO4)O8
Oⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Oⓘ CryptomelaneK(Mn74+Mn3+)O16
Oⓘ HematiteFe2O3
Oⓘ Lithiophorite(Al,Li)MnO2(OH)2
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ PyrophylliteAl2Si4O10(OH)2
Oⓘ QuartzSiO2
Oⓘ SpessartineMn32+Al2(SiO4)3
Oⓘ SudoiteMg2Al3(AlSi3O10)(OH)8
Oⓘ TurquoiseCuAl6(PO4)4(OH)8 · 4H2O
Oⓘ WavelliteAl3(PO4)2(OH)3 · 5H2O
Oⓘ ApatiteCa5(PO4)3A
MgMagnesium
Mgⓘ Ardennite-(As)Mn42+Al4(AlMg)(AsO4)(SiO4)2(Si3O10)(OH)6
Mgⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Mgⓘ SudoiteMg2Al3(AlSi3O10)(OH)8
AlAluminium
Alⓘ AndalusiteAl2(SiO4)O
Alⓘ Ardennite-(As)Mn42+Al4(AlMg)(AsO4)(SiO4)2(Si3O10)(OH)6
Alⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Alⓘ Lithiophorite(Al,Li)MnO2(OH)2
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ PyrophylliteAl2Si4O10(OH)2
Alⓘ SpessartineMn32+Al2(SiO4)3
Alⓘ SudoiteMg2Al3(AlSi3O10)(OH)8
Alⓘ TurquoiseCuAl6(PO4)4(OH)8 · 4H2O
Alⓘ WavelliteAl3(PO4)2(OH)3 · 5H2O
SiSilicon
Siⓘ AndalusiteAl2(SiO4)O
Siⓘ Ardennite-(As)Mn42+Al4(AlMg)(AsO4)(SiO4)2(Si3O10)(OH)6
Siⓘ BrauniteMn2+Mn63+(SiO4)O8
Siⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ PyrophylliteAl2Si4O10(OH)2
Siⓘ QuartzSiO2
Siⓘ SpessartineMn32+Al2(SiO4)3
Siⓘ SudoiteMg2Al3(AlSi3O10)(OH)8
PPhosphorus
Pⓘ TurquoiseCuAl6(PO4)4(OH)8 · 4H2O
Pⓘ WavelliteAl3(PO4)2(OH)3 · 5H2O
Pⓘ ApatiteCa5(PO4)3A
KPotassium
Kⓘ CryptomelaneK(Mn74+Mn3+)O16
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Caⓘ ApatiteCa5(PO4)3A
TiTitanium
Tiⓘ AnataseTiO2
MnManganese
Mnⓘ Ardennite-(As)Mn42+Al4(AlMg)(AsO4)(SiO4)2(Si3O10)(OH)6
Mnⓘ BrauniteMn2+Mn63+(SiO4)O8
Mnⓘ CryptomelaneK(Mn74+Mn3+)O16
Mnⓘ Lithiophorite(Al,Li)MnO2(OH)2
Mnⓘ SpessartineMn32+Al2(SiO4)3
FeIron
Feⓘ HematiteFe2O3
CuCopper
Cuⓘ TurquoiseCuAl6(PO4)4(OH)8 · 4H2O
AsArsenic
Asⓘ Ardennite-(As)Mn42+Al4(AlMg)(AsO4)(SiO4)2(Si3O10)(OH)6

Other Regions, Features and Areas containing this locality

Belgium
Eurasian PlateTectonic Plate
EuropeContinent

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

www.ardennes-coticule.com (2001) http://www.ardennes-coticule.com
Gustine, C. (2002) Les associations d'oxydes et d'hydroxides de manganèse dans le Massif de Stavelot. Mémoire de Licence, Université de Liège, 43 pages.
Hatert, F., Deliens, M., Fransolet, A.-M., Van Der Meersche, E. (2002) Les minéraux de Belgique (2nd ed.) Muséum des Sciences Naturelles, Bruxelles.
Blondieau, Michel (2005) Les gisements minéraux du Salmien dans le massif de Stavelot. . M. Blondieau, Tellin, Belgium.
Blondieau, Michel (2017) Le Coticule. Les Éditions du Stâve dès Boûs, 78 pages.
Blondieau, M.; Puccio, S.; Hatert F.; Depret, M.; Dal Bo, F. (2023) Minéralogie de la Formation d'Ottré au Thier del Preu et au Thier du Mont à Grand-Sart (Lierneux, Belgique), et comparaison avec les autres gisements régionaux. Bulletin de la Société Royale des Sciences de Liège, 92 (1). 71-152 doi:10.255118/0037-9565.11499
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