Difference Between Rock Salt and Sea Salt

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If you’re trying to change your diet to include healthier seasonings, or if you just want to experience the different flavors of salt, you’ll want to know the differences between rock and sea salt. These salts are used to make many savory dishes and have medicinal properties as well.

Rock Salt

Rock salt is a mineral derived from sodium chloride. Rock salt is grayish in color and is not as refined as the white iodized salt from the grocery store.

Sea Salt

Sea salt is created from the evaporation of sea water and is available in fine grain or larger crystals. It is said to be healthier than iodized salt because it is less processed.


Rock salt is mined in the United States; sea salt is usually imported from the Mediterranean Sea.


Sea salt is used for a number of spa treatments, including facials, therapeutic baths and pedicures to reduce skin inflammation. Rock salt is used to preserve meats and seafood.


Sea salt has a subdued flavor and can be used like regular table salt in a number of dishes. Rock salt has a much stronger flavor, so only a small amount is needed to keep meat fresh or accent the taste of food.