CRYSTAL KINGA Polish Rock Salt 250g Crystal Kinga rock salt is a crystallized product of sediments from the Zechstein Sea, a salt lake that formed in Europe during the Permian Period approximately 250 million years ago, and crystallized over a long period of time under the pressure of geological strata. It brings out the true flavor of vegetables, meat, fish, and other ingredients. It is of high quality, has no impurities, and can be used for a wide range of dishes, including Western, Chinese, and Japanese cuisine.