The most important minerals of potassium are: potash, sylvite,
carnalite, kainite, polyhalite, biotite, etc.
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Hematite: for iron
Ilmenite: for titanium
Pitchblende: for uranium
Monazite: for thorium and lanthanides
Polyhalite: for potassium
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This salt contain only approx. 95 % sodium chloride; the
remaining are impurities as polyhalite (a sulfate of K, Ca, Mg) and
others. The pink color is due to iron oxides. The use of this salt
has no advantages, it is just a fad for naive persons.