True Persian blue salt has a mix of white and pale to medium blue crystals. If the color is overly vibrant or uniform, it’s most likely dyed. The essential ingredients include things like sea salt, Persian blue salt, or butterfly pea powder, and optional additions for example baking soda http://www.parkwaypcfl.org/System/Media/play.asp?id=42717&key=0E7B4E0E-8D8E-48FF-B746-9E8423D43C45