Vermiculite is actually mined(from the ground) and is simply processed Mica.
It is light weight and somewhat fluffy when dry. It holds many times its own weight in water and this is what makes it useful as a plant soil additive and an incubation medium. It can contain small levels of asbestos as its mined from similar ore bodies, but this is of little concern. You should be careful not it inhale the dust when working with it in its dry form.
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Uncle Roy
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Herpetology - more than a hobby
It's a Lifestyle
celebrating 26 years of herp breeding
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