The Probert Encyclopaedia of Rocks & Minerals

SERPENTINE

Serpentine is a common mineral group with a relative hardness of 4. It is usually an alteration product of some magnesium silicate, especially olivine, pyroxene, and amphibole. It is frequently associated with magnesite, chromite, and magnetite. It has the formulae Mg6(Si4O10)(OH)8.
Research Serpentine