Analysis of Himalayan pink salt samples show that they are mostly 96% to 99% sodium chloride, with small amounts of calcium, iron, zinc, chromium, magnesium, and sulfur, all within safe levels below 1%. However, some salts from Pakistan need purification before use in food or industry because of impurities. Salt crystals from this area can be off-white to transparent, while certain veins may have a pink, reddish, or beet-red color due to trace minerals.