What kind of stone is vermiculite?
Sometimes, be like the fine soil. Vermiculite is heated to 300 degrees Celsius, it will expand to 20 times and then bent. Vermiculite is a bit like leech (Hirudo commonly known as the leech),
Vermiculite is a clay mineral with montmorillonite similar, layered silicate. Generally composed of biotite by hydrothermal alteration and weathering. It sometimes appears to be coarse biotite like (this is the illusion of biotite vermiculite)
It is such a name. Brown, yellow, vermiculite is dark green, like the oil sheen. After heating them into grey. Vermiculite can be used as construction materials, adsorbents, fire insulation materials, mechanical lubricant, soil conditioner and so on
