However, rock salt can contain trace amounts of other minerals, including some that contain metals. These can include:
* Iron (Fe): May be present as iron oxides or sulfides, giving the salt a reddish or brownish color.
* Calcium (Ca): Can be found as calcium chloride or sulfate.
* Magnesium (Mg): May be present as magnesium chloride or sulfate.
* Potassium (K): Can be found as potassium chloride.
It's important to note that the amounts of these metals are usually very small and unlikely to pose any health risks.
