Calcite Photos  
Cochise College               
Photos of Minerals
Geology Home Page

Roger Weller, geology instructor

[email protected]    copyright 2011-R.Weller
 

calcite-modified scalenohedron crystal-1
Mexico
Originally, a very sharp scalenohedron crystal (dogtooth spar) formed.  There must
have been a break in the crystallization process and then a change in the chemistry
of the mineralized solution, because a different type of calcite crystal, distinguished
by a termination of three low angle faces, started growing on top of the
scalenohedron.

calcite                                                                                                                                           mex8
Photo is copyright free only for non-commercial educational uses.
Just credit photo to R.Weller/Cochise College.