Serpentine

Serpentine is the name for a grouping of several related minerals, primarily antigorite and chrysotile. Antigorite serpentine is typically representative of the solid forms of serpentine , of which these forms are typically columnar in structure. Chrysotile serpentine consists of four separate groups: clinochrysotile, lizardite, orthochrysotile, and parachrysotile, all of which have the same chemical composition. The difference between these groups of chrysotile serpentines are their crystal lattices. A variety of other forms of serpentine exist, but most of them are extremely rare.