Let’s look at the article below which will briefly discuss rock salt at walmart.
What Is Rock Salt?
Rock salt is a mineral composed of sodium chloride, which is also known as table salt. It is found in nature in the form of large crystals and is typically mined from underground deposits. Rock salt has many uses, including as a de-icing agent, a preservative for food, and an ingredient in some cosmetics. It is also used to flavor food, such as chips and pretzels.
Rock salt is made up of large, coarse crystals that have a dull grayish-white color. While it can be used in its natural state, it is often refined and treated to remove impurities, making it more suitable for use in various applications. The size of the crystals can range from fine grains to large chunks.