Manufacturing holes with hollow bone according to the experiments the experiments on drilling of
talc, serpentinite, marble and jade, it was planned to identify labor costs
Optical properties of a new decorative stone—rayizite small amount of
talc. This stone exhibits the alexandrite effect, and the color is due to chromian
Catalytic effect of clay rocks as natural catalysts on the combustion of heavy oil the clay rocks. Clinochlore-
talc-type clay shows a strong inhibition effect on the isomerization