DIRK WIERSMA / SCIENCE PHOTO LIBRARY DIRK WIERSMA / SCIENCE PHOTO LIBRARY
Galenite and fluorite minerals. Galenite, a lead sulphide mineral and primary ore of lead has formed cubic crystals (black) on a base of fluorite (brown). Fluorite is a calcium fluoride mineral and an ore of fluorine. This sample measures 180 millimetres across.
Model release not required. Property release not required.