This depends on the quality of salt from a specified mine.
The solution of the mined rock salt (NaCl) is called brine.
Rock salt "rock" is mined from ancient seabed deposits or contemporary salt flats and crushed into a coarse mesh product used for roads, water softeners, and as feedstock for chemical products. It is further refined for use as table salt depending on origin and purity.
sodium is from salt rock. salt rock is mined and turned into table salt.
Rock salt is mined as a solid in salt mines. it does not need to be separated.
Rock salt
Table salt is obtained from rock salt (from mines) or from sea salt by refining up to 97 % NaCl or more. Common procedures include filtering of the solution and crystallization/recrystallization.
it was a salt rock
Chlorine is a gas so it is not mined. It is manufactured by the electrolysis of a brine (salt) solution.
Khewra and Dandot
If a solution containing rock salt is boiled, and the solvent evaporates you will be left with rock salt as the precipitate.
Pakistan has the largest reserves of Rock Salt in the world. Rock salt is mined in Khewra and Dandot. Both areas are situated in the upper Punjab.
By evaporating the water of the solution and condensing it.