Roger Weller, geology instructor
[email protected] copyright 2010-R.Weller
sulfur with conchoidal fracture
southern Michigan
Similar to obsidian and opal, crystals of sulfur can
break with a conchoidal
(shell-like) fracture.
sulfur
conchoidal1
Photo is copyright free only for
non-commercial educational uses.
Just credit photo to R.Weller/Cochise College.