The impregnated diamond bits are the most commonly useful bits in the mineral exploration industry, as they have the widest range of application. The carefully selected .. Black hornblende plagioclase gneiss, white plagioclase gneiss, quartz, dolomite marble, black marble, mica, dolomite, alteration. angle long glittering.
Vermiculite is a clay mineral similar to montmorillonite and is a layered silicate. Generally by biotite by hydrothermal alteration or weathering formation. It sometimes appears in the form of thick biotite (which is the illusion of biotite of vermiculite), sometimes subtle soil like. When heated to 300 ° C, vermiculite swells 20 times.