Serpentine subgroup
Subgroup of phyllosilicate minerals within the kaolinite-serpentine group
Serpentine subgroup (part of the kaolinite-serpentine group in the category of phyllosilicates) are greenish, brownish, or spotted minerals commonly found in serpentinite. They are used as a source of magnesium and asbestos, and as decorative stone. The name comes from the greenish color and smooth or scaly appearance from the Latin serpentinus, meaning "snake-like".
From Wikipedia, under CC BY-SA. More on occurri.