True blue salt—like Persian Blue Salt—emanates from mineral deposits present in Iran and areas of the Himalayas. Its placing tint is completely purely natural, produced by a trace mineral named sylvite, which refracts gentle to provide the crystals a cool, icy glow. Some variants use In a natural way http://www.solidrockumc.com/System/Media/play.asp?id=46107&key=485E0D8B-E6EC-4811-873F-73F90E5469E0