Roger Weller, geology instructor
email@example.com copyright 2011-R.Weller
calcite-twinned scalenohedron crystal-2
Joplin, Jasper County, Missouri
The notch at the center of this specimen is where the two crystals are joined
Photo is copyright free only for non-commercial educational uses.
Just credit photo to R.Weller/Cochise College
courtesy of Les and Paula Presmyk