Vintage natural grown Coticule with Hybrid Layer inclusions and BBW backing (GBB/BBB/BBW)

Size: 12x5x3cm, weight: XXXgr.
Density: X,XXgr./cm³ / Estimated grit size: very variable 4K-8K
Usage: with water or oil, water should be preferred
Colour: differs totally from which quarry and which layer the stone was quarried. To identify and get further more information about the different kinds, read Henk Bos - Grinding and Honing Part 4 about Belgian Whetstones in detail (www.bosq.home.xs4all.nl) additional a visit of Coticule.be (maintained & created by Bart Torfs) is recommended! (www.coticule.be)

A Sharpening Stone which is known as a Coticule, Belgian Waterwhestone or in german "Gelber Belgischer Brocken" which is also shortened as GBB. There is also a second type which is and in the past was mostly used a the backing of the Coticule, the "Belgian Blue Waterwhetstone" or in german "Blauer Belgischer Brocken" shortened as BBW/BBB. Coticules are very interesting in their apperance, none is like the other and sometimes they have really nice structures (banding, gradients, inclusions).

Concerning the performance of the stones, the Coticules are very flexible in usage. That means that the stones with a very thick slurry used with more pressure work quite fast and remove a lot of material! A moderate slurry is a bit slower, using plain water is the slowest way which is used to polish the bevel and finish on the Stone. Later on there is a link to both Sharpening techniques brought to paper from Coticule.be named "Unicot" und "Dilocut" which are both great if they are well learned.

"About this Stone"
A very thick stone (3cm) with a mixed up Coticule layer, on certain areas it has several hybrid layer inclusions (Quartz). It has a natural grown BBW backing. At the End on one side both layers (Coticule/BBW) get mixed up together, this is quite rare and ive never seen any comparable stone.

more about the History of Coticules can be found here:
www.ardennes-coticule.be/en/ardennes-coticule-en.html

General information on coticules:
Wikipedia.de: "Belgischer Brocken"
de.wikipedia.org/wiki/Belgischer_Brocken

Coticule.be
www.coticule.be

Salmchateau.be: "Le Coticule de Salchateau"
www.salmchateau.be/article39.html

Vielsalm.be: "Musee de Coticule"
www.vielsalm.be/loisirs-et-tourisme/culture/les-musees/mu...

Sources of buying coticules:
Ardennes-coticule.be, Founder is Maurice Celis
www.ardennes-coticule.be

Belgischer-Brocken.com, Site from Steffen J. Lindner:
www.belgischerbrocken.de/

The Supirior Shave (TSS):
thesuperiorshave.com/

How to use a coticule:
Coticule.be: "Méthode Unicot" with PDF Files in EN, NL, IT, FR, ES, DE
(Link: www.coticule.be/unicot.html)

Coticule.be: "Méthode Dilucot" with PDF Files in EN, NL, FR, ES
(Link: www.coticule.be/dilucot-honing-method.html)

Geological Information:
Région Walonne, Bra Lierneux, 55/3-4: "Carte Géologique de Wallonie "
Échelle: 1/25000, Notice Explicative
(Link: geologie.wallonie.be/files/content/sites/geoprod/files/re...)

Literature:
[1] Bos, Henk - "Grinding and Honing Part 4 Belgian Whetstones", Info 20M, ISSN 1872-7824
(Link: www.xs4all.nl/~bosq)

[2] Boulvain, F. Prof. & Pingot, J. L. Dr. - Excursions: "Une introduction à la GEOLOGIE de la WALLONIE", Université de Liège, Faculté des Sciences, Département de Géologie, 2014
(Link: www2.ulg.ac.be/geolsed/geolwal/geolwal.htm)

[3] Boulvain, F. Prof. - Excursions "Excursions des cours de Processus Sedimentaires et Geologie de la Wallonie", Université de Liège, Faculté des Sciences, Département de Géologie, 2013

[4] Caubergs Michel - "Inventaire de quelques anciennes mines et carrieres souterraines de Wallonie", Essai D'archeologie miniere, 1991

[5] Devleeschouwer, Xavier / Mullard, Cyril / Goemaere, Eric - "Underground Workings of Slate Vein and Coticule in the commune of Vielsam (Belgium): The Geological Risk Management through Database and GIS", Post-Mining 2005, November 16-17, Nancy, France
(Link: gisos.ensg.inpl-nancy.fr/fileadmin/File/PM_2005/PM05_pdf/...)

[6] Gaspard, Charles - "L'industrie de la Pierre a rasoir dans le region de Sart-Lierneux", Extraites des Enquêtes du Museé de la Vie Wallonie, TOME XIV (No. 5 157-160)

[7] Goemaere, Eric - "Ardoise et coticule en Terre de Salm, Des pierres et des Hommes", Collection Geosciences du Service Géologique de Belgique, Institut Royal des Sciences Naturelles de Belgique, ISBN : 978-2-9600676-1-3
(Link: www.sciencesnaturelles.be/institute/structure/geology/gsb...)
(Extrait "L'atelier Burton: www.sciencesnaturelles.be/institute/structure/geology/gsb...)

[8] Goemaere, E. & Declercq, P-Y. , 2012. "Le "coticule" de Vielsalm et Lierneux (Belgique)" une pierrre à aiguiser au passé mondial. Ann. Soc. géologique du Nord, 19 (2e série), 117-131

[9] Lessuise, A., "Le coticule. Situation géographique et géologique des gisements. Exploitation et préparation des pierres abrasives. Valorisation des déchets d’exploitation" Annales des Mines de Belgique, 1: 101-125, 1981

[10] Remacle, A. - "Les ardoisières de l’Ardenne belge" Intérêt biologique et état des lieux des sites en surface. Région wallonne, Direction Générale des Ressources Naturelles et de l’Environnement, Division de la Nature et des Forêts, Travaux n° 30, 189 p., 2007

[11] Renard, A. & S.J. - "Sur la structure et La Composition Minéralogique Du Coticule et sur ses Rapports avec Le Phyllade Oligistifère, 21.10.1876

[12] Knight, Richard - Appendix No. V Pages 231-237, Paragraph Nr. 15 in "Transactions of the Society instituted at London for the...Encouragement of Arts, Manufacturers and Commerce, Vol. L, 1836

███▓▒░░.Text and Links created by RAZORLOVESTONES 05.09.2014.░░▒▓███

Taken on: September 3, 2014

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