PIEDRA DE AFILAR natural. Técnicas de corte artesanal de este "ORO NEGRO" en la naturaleza

Sylvain Cuminetti was the heir to that Italian peddler who discovered this “black gold” from Ariège, in the French Pyrenees. Continuing an old family tradition, in 1997 it was the last French producer of natural sharpening stones. If you liked this documentary, you can show your SUPPORT and HELP for the channel to continue growing with the "Thank you" and "Channel Member" buttons that appear under each video. You can also learn more about my life, work and career in this BIOGRAPHICAL DOCUMENTARY:    • EUGENIO MONESMA. 40 años de vida, trayecto...   Follow me on my SOCIAL NETWORKS: -FACEBOOK:   / eugeniodocumentales   -INSTAGRAM:   / eugeniomonesma   -TIKTOK:   / eugenio_documentales   -TWITTER:   / eugeniomonesma