Salt crystals, or halite crystals, typically have a cubic shape. This is because the sodium and chloride ions that make up salt arrange themselves in a regular, three-dimensional lattice structure with equal distances between them, resulting in a cube.

However, the actual shape of salt particles can vary depending on factors like:

* Crystallization conditions: The rate of cooling, the presence of impurities, and other factors can influence the crystal shape.

* Size and processing: Salt is often ground or crushed, which can change the shape from cubic to irregular.

* Type of salt: There are different types of salt, such as sea salt, rock salt, and table salt, which can have slightly different crystal structures and shapes.

So while the ideal shape of salt is a cube, you'll often see it in other shapes as well.