French Grey Sea Salt is a culinary delight favored by professional chefs around the world! This admired delicacy is formed when sea water flows into the French Guerande marshes during high tide. It is hand-harvested by salt workers, using skills and methods over a thousand years old. Sel Gris de Guerande obtains its natural grey coloring from the salt crystallizing on glay, which makes it dense in flavor and nutrients. Our Grench Grey Sea salt is 100% natural and carries the Nature & Progres certification label from France.