Because is not recommended to eat dirty salt.
Rock salt is in some ways similar to Coarse Salt, but do have differences, these are, rock salt is mined from underground deposits and goes through various processing techniques whilst coarse salt ( Kosher) is relatively pure and contains no iodine or any other additives.
You might try dissolving the same weight of rock salt and table salt in the same amount of distilled water and seeing how the solutions match up for clarity.
Purified salt may not be safe to eat because it may have the bacteria of the rock salt on it still. To make it pure you should boil the bacteria off the salt after it has been purified.
A salt solution is a homogeneous (uniform) mixture of salt and water, and is not a pure substance.
Rock salt is not flammable.
By evaporating the water of the solution and condensing it.
Generally rock salt is more impure than table salt.
Rock salt and table salt are both sodium chloride - NaCl; table salt is the pure form of rock salt.
It's really try it and you will find out relative
Rock salt contains all the minerals found in the seawater from which it formed. These will be many, but NaCl will be the main one.
It is a house which helps rock salt turn into pure salt!
This is possible only after the determination of impurities in the rock salt.
The luster of rock salt is Vitreous (glassy)
This percentage is determined by chemical analysis; for some salt mines this percentage is over 99 %.
Dissolving tanks, filters and crystallization/recrystallization equipments.
evaporation followed by filitration
Rock salt is in some ways similar to Coarse Salt, but do have differences, these are, rock salt is mined from underground deposits and goes through various processing techniques whilst coarse salt ( Kosher) is relatively pure and contains no iodine or any other additives.