Orthoclase is a metastable phase variant of potassium feldspar and an insoluble potassium salt mineral. The structural state of potassium feldspar is low orthoclase, followed by medium orthoclase, and a few are medium microcline. Potassium feldspar is generally flesh-red, yellow-white, white or gray. Potassium feldspar crystals are often in the shape of short columns or […]