Stone base was potassium feldspar, plagioclase, black mica and Angle stone, DuoZhong material within the aggregation of granite, granite, is in long rocks, quartz class of rock weathering, half weathering product. By grey appearance, rice flour, dark brown a few kinds of color composition. It has the necessary human, more than 10 kinds of trace element: no potassium, sodium, calcium, magnesium, phosphorus constant elements and zinc, iron, selenium, copper, strontium, iodine, fluorine, and running.
Stone containing the aluminum-silicate (feldspar), of pigment and bacteria have adsorption ability, if will grind stone into powder, ion dissolution and adsorption effect will increase
