Himalayan Salt: mines in Pakistan, gets it's pink color for iron oxide
Himalayan salt is mined from the Salt Range mountains, in the Punjab region of Pakistan. Compared to table salt, Himalayan salt contains a wide range of elements as impurities. These include calcium, iron, magnesium, manganese, potassium, aluminum, barium, silicon, and sulfur. On top of this, it contains lower sodium levels than table salt. Pink salt, however, is not healthier than regular table salt. Differences in nutrition would not be noticed without massive intake, and even then the dangers of the amount sodium would override any benefit gained.
It is believed that salt lamps release ions, and this somehow benefits the body. This claim has no base in science. As well, pets may get salt poisoning from having licked a salt lamp. Please use caution when considering have one in your home if you have pets who reside there.
Calcium: Calcium is the fifth most common element in the human body and has many uses within it, though most may know it's importance in bones. It is also the fifth most common element in the Earths crust, and third most abundant metal. This silvery colored metal is stable when in large mass but combusts when made small enough. It is also part of (what I think is) an interesting cycle. As mountains rise, stones containing calcium are exposed. Calcium is released in surface water as the stones are worn down by the environment. This is transferred eventually to oceans where the calcium reacts with dissolved carbon-dioxide and together forms limestone! These settle in the ocean floor and then become new rocks. For use, we mainly use calcium in the making of steel, though alone it is brittle. I associate this element with strength in being synchronous, one that crumbles or snaps if pressed from the wrong direction, continuous communication, and earthen energies.
Iron: Iron is in celestial bodies, such as stars. It can be associated not only with the Earth, but with the universe as well. This well mirrors the physical body, and the spirit. (Stars that begin forming iron in their core are also on their way out, further associating with mortality with the material, aside form its association with blood.)
Iron is fantastic in binding magic as it is commonly known as a strong, ungiving thing. (Not to mention its wide use historically and modernly in binding items such as shackles, chains, and cages.) I magically correspond iron to strength, protection, power, courage, conquest, mortality, binding force.
Magnesium: Magnesium is the fourth most common element found in the earth. It is found in aging stars and recycled into new stars after the supernova expels it. Magnesium protects itself with a thin layer of oxidization that is near impermeable, does not occur naturally without combination with other elements, and burns as a bright white light. I personally correspond this element to mortality, reincarnation, and as a tool for connecting to the spirit.
Manganese: Manganese is also believed to be created in stars and expelled in supernovas to be recycled. Hard and brittle on its own, manganese is used in metal working to improve the metal's strength, durability, and resistance to wear. Manganese is also used in coloring/pigmentation and has been used as such as far back as the stone age. It is important in bone formation and is also found in the liver, kidneys, and brain. I magically associate this with strength in perseverance and will, as well as expression of process.
Potassium: Potassium does not occur as its pure self naturally in the earth due to it's high reactivity. It reacts to both air and water; the reaction of water being highly violent. Potassium is necessary for all living cells and normal nerve transmissions. I see this element as potentially being used as a form of conduit for life force energies, though I admit I am not incredibly familiar with this elements uses in magic.
Aluminum: This element is soft, reflective, ductile, and non-magnetic. It's use permeates much of our modern lives and will be easy to find. I magically associate Aluminum with being solidary and unaffected by indirect forces, though easily affected by direct actions.
Barium: Barium does not naturally occur purely in the world due to it's high chemical reactivity. It is incredibly difficult to purify, and thus many of it's properties remain not accurately known. We do know it is soft, with high electrical conductivity. I am excluding magical correspondences for Barium due to my lack of knowledge about it.
Silicon: I am not versed with silicon or it's magical applications as of yet.
Sulfur: Also known as brimstone. This bright yellow element is necessary for all life; necessary for biochemical function and a macro-nutrient for all living things. It is used in matches, fungicides, insecticides, and black gunpowder. Very flammable, sulfur has been referred to in the religious context of hell: "Fire and brimstone." I find it interesting that sulfur is so needed for life, and yet is used for means of suffering or ending of life. I magically correspond this to the desire for control, the action of living and death (depending on use), as well as fire energies.
We have established there are no extra benefits to use of pink salt, as determined by science. Magically, use of Himalayan salt and such lamps as well, could be used in a way that nourishes life, vitality, and energetic strength. The mortal life and its connection to the spirit seems prevalent in the correspondences here, so perhaps keep this in mind. I also recommend doing some research into the area this salt is mined from. I believe this post is long enough without including the importance of the area.