Known as “white gold” those in that part of the world, Himalayan Rock Salt is the purest form of salt available on earth. Mined from ancient deposits deep in the Himalayas, salts contain many of the valuable minerals your horse needs to promote a healthy balance in the body. Iron, potassium, and magnesium are particularly useful in replenishing electrolytes lost during hard work. It is these minerals that give the Himalayan Rock Salt its signature rosy color. The Centaur® Himalayan Rock Sock is 100% all natural. Perfect for horses that won't lick a block. Just sprinkle on the horse's feed.