Tourmaline Photos             
Cochise College                                                                                                               
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Roger Weller, geology instructor                       

wellerr@cochise.edu

Tourmaline 
last edited:  12/19/07    number of photos:  5
Tourmaline is Na(Li,Al)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄                        
hardness: 7 to 7.5
tourmaline as a mineral

cabochons
tourmaline cabochons, mixed colors:  A  B

tourmaline in jewelry

tourmaline beads:  A  B  C

Photos are copyright free for non-commercial educational uses. 
Just credit photos to R.Weller/Cochise College.
copyright 2007-R.Weller