Sylvite, Sylvanite, Langbeinite, Glascrite are ore of which nutrient?

Sylvite, Sylvanite, Langbeinite and Glascrite are ore of potash nutrient.
Sylvite or sylvine is potassium chloride in natural mineral form. It forms crystals in the isometric system very similar to normal rock salt.
Sylvanite is a gold: silver ratio and is a metallic mineral with a colour that ranges from a steely gray to almost white.
Langbeinite is a potassium magnesium sulphate mineral. It is a unique source of plant minerals.
Glascrite is formed as an intermediate compound and an ore of potash.