Sel Gris is a sea salt that is a by-product of making Fleur de Sel by evaporating basins of sea water. See “Fleur de Sel” entry for more information.
The clay at the bottom of the basins gives the salt its flavour and grey colour.
Sometimes it is called Celtic Salt because the Celts, who lived in Brittany, France, have been making it for a long time, even before the Romans arrived there.
Literature & Lore
“Sel Gris” means “grey salt”.