Vermiculite is one member of the micaceous hydrated silicate minerals, resembling mica in appearance. When heated to a temperature of about 850-950℃,as water flashing into steam, raw vermiculite instantly expands (exfoliates) up to 15-20 times, maximum 30 times its original bulk volume, and during expansion its color change from gold brown into silver white. It has the action of fireproof, heat insulating, sound and moisture absorbing, non-toxic, lightweight and disease free and so on.

Appearance: Brown to yellow or silver white flakes, powders.

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