phlogopite
Our phlogopite: KMg₃[Si₃AlO₁₀][ F,OH]² , natural phlogopite comes in two colors: dark color and light color. General phlogopite is in yellow, dark brown or black ,glass-luster, cleavage surface often shows pearls or submetallic lustre. Phlogopite can be rusted and broken down in concentrated sulphuric acid, meanwhile produce a kind of milky solution. The varieties of phlogopite are: alurgite, titanmica, verdite phlogopite, fluorine phlogopite etc.