Cochise College     Photo of the Month

                          Geology Home Page                December 2006

                          Roger Weller, geology instructor

                          wellerr@cochise.edu
                                  copyright 2006-R.Weller

Andalusite-variety chiastolite
Shaanxi Province, China  
Andalusite is (AlF)₂SiO₄
When the crystals are sliced at right angles to their lengths, they display a cross-like pattern.


Photo is copyright free for non-commercial educational uses.  Just credit photo to R.Weller/Cochise College.