51.5 MB (2.9 MB compressed)
5197 x 3465 pixels
43.9 x 29.5 cm ⏐ 17.3 x 11.6 in (300dpi)
DIRK WIERSMA / SCIENCE PHOTO LIBRARY DIRK WIERSMA / SCIENCE PHOTO LIBRARY
Pyrolusite crystals. Pyrolusite is a mineral consisting mainly of manganese dioxide. It is an important ore of manganese. This specimen measures 85mm across and was found in Ilfeld in the Harz Mountains, Germany.
Model release not required. Property release not available.