coarse sea salt

Coarse sea salt is a mineral seasoning produced by the evaporation of seawater in shallow ponds or marshes, rather than being mined from underground salt deposits. The crystals are larger and more irregularly shaped than refined table salt, typically ranging from 2-5 millimeters in diameter. Sea salt retains trace minerals from its oceanic source, including magnesium, potassium, and calcium, which contribute subtle flavor complexity. The crystalline structure and mineral content produce a cleaner, more delicate saline taste compared to refined salts, without the anti-caking agents or iodine additives common in commercial table salt.

Regional variations exist based on source waters and evaporation methods; notable producers include France's Guérande and Sel de Camargue, and Celtic sea salt from Brittany. Some sea salts develop greyish coloration from mineral content and algae interaction during harvest.

Coarse sea salt is employed as both a seasoning and finishing salt across Mediterranean, European, and contemporary cuisines. Its larger crystals make it ideal for hand-sprinkling as a finishing element on dishes, where individual grains provide textural contrast and controlled salinity—particularly on grilled meats, roasted vegetables, and seafood. It serves as the foundation salt for brining, curing, and preserving due to its quick-dissolving properties and mineral profile that enhances preservation. In cooking, it is used in salt crusts for baking fish or vegetables, in salt beds for oyster service, and as a general seasoning salt for stocks and cooking liquids, though its irregular crystal size can make precise measurement challenging compared to refined salt.