Heavy calcium carbonate is the choice of high-quality white calcite as raw material, through mining, washed and dried, rough broken, broken, ground, Ultra-grading processes processed, and each proced…
Low-temperature quartz appearing with steeple of the six-party columnar crystals outputs, a cylindrical stripes and similar to the six-party-ubiquitous steeple, in fact, consist of two single rhomboh…
Mica main crystallization monoclinic crystal was thin at the six-party Flake, Flake, tabular and sometimes six-party column was false. Hardness 2 -3, the proportion of 2.70-3.20. Mica of refractive i…
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