Sulfur
Photos Roger Weller, geology instructor
wellerr@cochise.edu copyright 2008-R.Weller
sulfur with conchoidal fracture
Similar to obsidian and opal, crystals of sulfur can
break with a conchoidal
(shell-like) fracture.

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