Pink Himalayan salt
Source
Khewra Salt Mine in Pakistan
Composition
Mostly sodium chloride, plus trace minerals like calcium, potassium, magnesium, and iron
Uses
Cooking, food presentation, decorative lamps, spa treatments, and as a food additive
Taste
Different from regular table salt due to its trace minerals
Health claims
Some claim it has health benefits like detoxifying the body, improving air quality, and reducing asthma and allergy symptoms
Pink Himalayan salt is hand-extracted and minimally processed, so it's considered a natural alternative to regular table salt. It's available in a variety of grain sizes, from fine powder to extra coarse.  
The American Heart Association recommends that healthy adults consume no more than 2,300 milligrams of sodium chloride per day, which is about one teaspoon of regular table salt. One teaspoon of pink Himalayan salt contains about 2,200 milligrams of sodium.