It is commonly used in cooking, in place of other table salt, in brine, and for bath products such as bath salts. Blocks of salt are also used as serving dishes and in the preparation of food. Fish and some meats can be preserved for use in certain dishes, and blocks of salt can be slowly heated to a temperature of around 200 °C (400 °F) and used as a cooking surface thereafter.
Large crystal rocks, mined in Europe and Asia, are also used as salt lamps. A salt lamp is a lamp carved from a larger saltcrystal, often colored, with an incandescent light bulb or a candle inside. The lamps give an attractive glow and are suitable for use as nightlights or for ambient mood lighting. When illuminated, salt crystals emit a soft glowing light. There is a belief that heated salt crystals emit negative ions or positive energy waves into the air, however there is no scientific evidence that salt lamps actually give out a measurable amount of anions, nor is there any evidence of any health benefits from the lamps.