Yes, they come from the same mine in Pakistan. They process it into lamps, animal licks, rock salt, fine salt, etc from the same source.

Just clean the surface with a wet cloth to ensure there’s no residual dust/debris and you can shave away. It probably won’t yield even size grains, but you can use it for whatever you like.

it’s more for a joke example though, much easier to just buy the salt.

That all being said, the ones from Pakistan are not coated in anything, so if its from an unknown source, you might want to check if the seller maybe added some spray on agent to protect the salt, although I really don’t see any reason why they would do that.

spoiler

And don’t buy any pink salt that says “made in India”. That money essentially funds some PMLN crooks who thought it would be funny to kneecap Pakistan’s agriculture export market by banning sales to any broker except themselves, of which they heavily undersell to India who then makes profit and shares it back only with them.