From the mareks, Opinel:
Sourced from the Ariège in the French Pyrenées, the large natural sharpening stone has a fine grain. Made of schistose sandstone, it effortlessly sharpens knives and restores their sharp, cutting edge.
Wet the stone before use.
Recommended for kitchen and folding knives.
Opinel is a company based in France, founded in 1890.