* Crystalline: Rock salt is composed of halite crystals, which are typically cubic in shape.

* Coarse: The crystals can range in size, but are generally larger than the fine grains found in table salt.

* Uneven: The crystals aren't perfectly smooth and can have irregular shapes and edges.

This texture is what makes rock salt suitable for uses like:

* De-icing: The larger crystals provide a more effective melting action.

* Cooking: The uneven surface allows for a slower dissolution rate, creating a more gradual saltiness in food.

* Bath salts: The rough texture can provide a gentle exfoliating effect.

Let me know if you have any other questions about rock salt!