I don't buy salt blocks just the regular fine grind to use for cooking. Sunfood Superfoods is one brand that I really trust: https://www.amazon.com/Sunfood-Superfoods-Pink-Himalayan-powder/dp/B00R5CACZE/ref=sr_1_2_a_it?ie=UTF8&qid=1476720052&sr=8-2&keywords=himalayan+salt+sunfood