What is the difference between quartz and mica?

Answer:

Biotite is black to dark brown, dark green color; phlogopite yellow, brown, green or colorless; pale purple, lepidolite rose red to grey. Glass luster, the cleavage plane is pearl luster. Quartz appearance are usually colorless, white, milky white, pale translucent state, Mohs hardness 7, off the mask glass luster or fat luster, because the proportion of crystal varies, changes between 2.22-2.65. With the ordinary sand, crystal is a kind of material with out of the womb. Quartz stone is a kind of stable mineral at room temperature, insoluble in water and sulfuric acid, hydrochloric acid, nitric acid, hardness of 7. And the proportion of about 2.65, the melting point of 1713 DEG C. Glassy luster, sometimes a fat like texture pure colorless;

Containing impurities are red, yellow, blue, black, brown, purple, green; transparent to opaque, brittle fracture. A shell shaped or irregular shaped. The crystal is six square column, column mask stripes. Difference between left and right. The crystal crystal quartz is very common. Usually a twin crystal cluster or granular, massive collection of quartz. Through ability, ultra violet is not conductive.

The type of mica, common which belongs to monoclinic system, followed by the three party system, the rest of the rare. Mica is usually false six square or diamond shape, columnar crystal. Vary color with chemical composition, mainly with the increasing of Fe contents and Muscovite colorless transparent or deep. A light;