Part 1 – Atom: Which salt is best? Is the idea of a complete salt ban really correct, or is the subject more complicated? This episode opens the discussion by examining common questions about salt.
Frequently Asked Questions About Crystalline Rock Salt
Rock salt is natural halite obtained from ancient underground evaporite deposits. Like other edible salts, its principal chemical component is sodium chloride. What mainly distinguishes rock salt from sea salt or lake salt is the geological source from which the salt originated and the way it is extracted and processed.
Which salt is best?
There is no single type of salt that is automatically best for every purpose. For food use, relevant factors include food-grade suitability, source, grain size, production conditions and packaging. Finely ground salt is convenient for direct table use, while coarse crystalline salt may be more suitable for grinding or particular culinary applications.
Why can rock salt have different colours?
Pure halite can be colourless or nearly white. Natural deposits may also contain small quantities of clay, minerals or other geological inclusions that produce grey, pink, yellowish or other shades. Colour alone does not establish the purity, quality or nutritional superiority of a salt.
Does crystal size matter?
Crystal size mainly affects how the product is used. Fine salt disperses quickly and can be used directly. Coarser granular salt can be suitable for table grinders, controlled dissolution and other applications. Salt from the same geological source can therefore be crushed and sieved into several different grain sizes.
How should rock salt be stored?
Salt can absorb moisture from its surroundings. It is therefore best stored in a clean, dry and closed container or package. Moisture may cause crystals to clump together, although clumping by itself does not mean that the basic sodium-chloride structure of the salt has changed.
Are all natural rock salts the same?
No. Deposits differ in geological age, depositional environment, associated minerals and mining conditions. For that reason, terms such as “natural” or “crystalline” should not be the only criteria used when describing a rock salt. Its documented source, processing method and intended use provide more useful information.
This page provides general information rather than personalised dietary or medical advice.
For related guides and articles, see the Rock Salt Guide section.