Celtic grey sea salt (also known as sel gris) in a 250g package is a natural, unrefined sea salt traditionally hand-harvested from the coastal regions of France, specifically Brittany. It is highly regarded for its unique mineral profile and culinary versatility. 

Key Characteristics
Origin & Harvesting: It is traditionally collected by salt farmers using wooden tools from clay-lined salt ponds. The interaction with the clay lining gives the salt its distinctive light grey color.
Mineral Content: Unlike refined table salt, Celtic grey sea salt retains over 80 trace minerals, including magnesium, calcium, potassium, and iron.
Texture & Moisture: It typically has a moist, crunchy texture because it is sun-dried and not completely stripped of its natural brine.
Flavor Profile: It offers a complex, briny, and less “sharply salty” taste compared to regular table salt, making it a favorite among chefs.