In its natural form, it occurs in most parts of the Earth's crust and can be mined directly from it.  
In its natural form, it occurs in most parts of the Earth's crust and can be mined directly from it.  There are two types of it, amphibole and crystotile, and it is believed that amphibole is the more harmful of the two. Its fibrous nature makes it particularly good in environments which require high friction and it is an excellent flame retardant. Unfortunately, the fibers flake off easily and can be inhaled, greatly increasing the risk of cancer. FTP, what is this material which until the 1970s was widely used to fireproof homes?
In its natural form, it occurs in most parts of the Earth's crust and can be mined directly from it.  
asbestos