I cannot find the source for it right now. But I read that the Himalayan Salt thing is just your generic scam to fool gullible New Agers into paying big bucks for salt that really comes from some polluted lowland area in Pakistan, containing loads of flouride.
This is what I've heard(read). I do not know if it is accurate or not. Take it how you wish.
I don't think you can take any salt and expect it to do the same as Iodoral.