1 Photos
Kainite
Chemical Formula	KMg[Cl|SO4]·3H2O
Species	Sulfates
Crystal System	Monoclinic
Mohs Scale	2-3
Specific Gravity	2.15
Color	colourless; yellow, brownish, greyish-green, red, Purple, blue
Streak	white
Luster	Vitreous
Refractive Index	n = 1.494 n = 1.505 n = 1.516
Diaphaneity	Transparent
Cleavage	Perfect, perfect.
Fracture	Splintery
Crystal Habit：Crystals thick tabular to equidimensional; often exhibiting numerous forms. Occurs as crystalline coatings and clusters in cavities or fissures in which single crystals may reach several centimeters; granular massive.

Kainite (MgSO₄·KCl·3H₂O) is a mineral salt that consists of potassium chloride and magnesium sulfate and is used as a fertilizer. This mineral is dull and soft, is colored white through yellow to red and is found in the Stassfurt salt mines in Saxony, Germany. It is a natural salt occurring in irregular granular masses, and is used as a source of potassium and magnesium compounds.