Golden mica. High grade, good quality. The only origin for detrital ... Hardness of2-3, the proportion of 2.70-3.20, a loose density of 0.3-0.5. The refractive index ... mica minerals, according to the texture exploration department, there is a broken mica reserves of 1,700,000 tons. They are ... . Looking forward to your kindly inquiry and inspection to us! Golden mica