Microcline
Chemical Formula	KAlSi3O8
Species	Silicates
Crystal System	Triclinic
Mohs Scale	6
Specific Gravity	2.55-2.63
Color	White, grey, greyish yellow, yellowish, tan, salmon-pink, bluish green, green.
Streak	White
Luster	Vitreous
Refractive Index	n = 1.514 - 1.529 n = 1.518 - 1.533 n = 1.521 - 1.539
Diaphaneity	Transparent, Translucent
Cleavage	Perfecton , good on
Fracture	Irregular/Uneven
Crystal Habit：Prismatic crystals (to 50 m and 13,500 t), granular, massive. Commonly forms perthitic intergrowths.
Geological Setting：Plutonic felsic rocks, pegmatites, high grade metamorphic veins, hydrothermal veins