Guerande salt is the fruit of the ocean, sun and wind. It is hand-harvested by the salt workers, using a traditional method a thousand years old. Guerande Fine Salt is an unrefined product simply dried and crushed. As it doesn't contain any chemical additives, small lumps may form as a result of humidity. This is perfectly natural and does not harm the quality of Guerande Fine Salt. It is ideal for all uses, in the kitchen and on the table.