Throughout the world there are different types of salts used by many diverse cultures to produce various flavors. Gray salt, also spelled "grey" salt, is one of these many culinary salts.

The basic chemical composition of salt is sodium chloride (NaCl), which is also known by the mineral name "halite."

Gray salt is light gray to grayish purple in color. This color comes from the clay it is mined from. Gray salt is moist.

Gray salt is also know as "sel gris" and "Celtic sea salt." It is a kind of Celtic sea salt.

Among sea salts, gray salt is considered to have the highest amount of magnesium.

Gray salt is commonly mined on the coasts of France in Guérande, Brittany. It is mined using traditional methods.