Description

?Vermiculite is a layer-structured metamorphic rock of gibbsite silicate.Rich in magnesium, it comes fr-om hot-liquid-eroded or weathered phlogopite.When it is heated to lose water and expands, lt turns curvingas a leech.Therefore is is called vermiculite.lt can be divide into original vermiculite and expanded vermicu-lite. color it can also be divided into golden vermiculite and white vermiculite.