DIRK WIERSMA / SCIENCE PHOTO LIBRARY DIRK WIERSMA / SCIENCE PHOTO LIBRARY
Sulphur crystal. Sulphur is non-metallic element. It forms bright yellow polyhedron crystals when able to grow in open space, as in the rock cavity here. This specimen, from Assoro, Sicily, Italy, measures 45 millimetres from tip to tip.
Model release not required. Property release not required.