Celtic sea salt

What is Celtic sea salt?

Celtic sea salt brings a distinctive texture to the kitchen: coarse, slightly damp crystals with a soft grey colour. Our salt comes from the Atlantic salt marshes of Guérande in France, where seawater, sunshine, wind and traditional harvesting methods shape the finished ingredient.

You may also see this style described as sel gris, meaning grey salt, or gros sel, meaning coarse salt. These names help describe its appearance and grain size. When choosing a salt, check the origin and processing information for the particular product rather than assuming every salt sold under a similar name is identical.

• Origin of our saltGuérande, France
• TextureCoarse, naturally moist crystals
• Main componentSodium chloride
• Everyday roleSeasoning and culinary preparation

From salt marsh to kitchen

In Guérande, seawater is channelled through shallow ponds. As water evaporates in suitable weather, the brine becomes concentrated and salt crystals form. Salt workers gather the coarse salt by hand using long-handled tools.

The grey character is associated with the clay-lined ponds where coarse salt crystallises. Fleur de sel is different: its delicate crystals are gathered from the surface. Neither name describes a recipe or a seasoning blend; they refer to distinct forms of sea salt.

Our coarse salt is supplied unrefined, without added anti-caking agents. Its character is therefore different from a uniformly dry, fine table salt. The product page gives the details of the salt currently in our range.

Understanding the crystals and mineral content

The first thing you may notice on opening the bag is that the crystals feel slightly damp. They may gather into soft clumps rather than pouring like dry table salt. This is a normal feature of moist grey sea salt, not a reason to expect perfectly separate grains.

Coarse crystals also behave differently in a recipe. They take longer to dissolve than finely ground salt, and a spoonful can contain a different weight depending on crystal size and how closely the grains pack together. For recipes that specify an exact salt amount, weighing is more consistent than swapping spoon measures.

Celtic sea salt is principally sodium chloride, with smaller amounts of other minerals. Those trace amounts are part of its composition, but do not make a normal culinary serving a complete mineral supplement. Unfortified sea salt is not a dependable source of iodine. Explore our iodine ingredient guide if you would like to understand that separate ingredient.

How to use coarse Celtic sea salt

Think about the texture you want in the finished dish. Dissolving the crystals gives even seasoning throughout a liquid; grinding them gives you more control when seasoning at the table.

• Soups, sauces and cooking water: add a small amount, allow it to dissolve, then taste before adding more.
• Roasted vegetables: crush the crystals if you prefer a finer, more evenly distributed seasoning.
• Finishing dishes: use sparingly where a little crystal texture suits the food.
• Brining and fermentation: follow a reliable recipe and weigh the salt accurately. Do not assume a coarse spoonful is equivalent to the same spoonful of fine salt.

For grinding, choose a mill designed for moist sea salt and follow the manufacturer's guidance. A pestle and mortar offers a simple alternative for preparing a small amount. The appeal here is flavour, texture and traditional production: use it as a seasoning, rather than adding large amounts to a daily routine.

Celtic sea salt in our range

You will find this ingredient in three different places in our range. The format matters: food salt and a scented bath blend have different intended uses.

Epsom salt and sea salt are different ingredients: Epsom salt is magnesium sulfate, while sea salt is mainly sodium chloride. Read the full label when comparing blends.

Storing and handling your salt

Reseal the bag after use and keep it away from splashes, strong odours and kitchen steam. Use a clean, dry spoon so you do not introduce food residue or extra water into the bag. If transferring it to a container, choose a clean food-safe jar with a well-fitting lid and retain the original product information.

Some clumping is expected with naturally moist salt; gently break it apart as needed. Follow the pack's storage guidance. Keep food salt separate from bath products, especially if you decant them into similar jars.

Celtic sea salt questions answered

Keep exploring the ingredients

Discover how different ingredients fit into our range in the Learn ingredient library, or read about magnesium and iodine.

For background on traditional harvesting, see Le Guérandais' explanation of coarse salt and fleur de sel. This explains the regional process; it is not a certification statement for our particular product.