Roger Weller, geology instructor
firstname.lastname@example.org copyright 2010-R.Weller
hexagonal pseudomorphs after aragonite-3
This apparently hexagonal plate originally started out as a complex twin of
aragonite crystals, but has since been converted to calcite.
Photo is copyright free only for non-commercial educational uses.
Just credit photo to R.Weller/Cochise College.
Specimen from the Cochise College collection