DIRK WIERSMA / SCIENCE PHOTO LIBRARY DIRK WIERSMA / SCIENCE PHOTO LIBRARY
Amethyst filled geode. Crystals of amethyst filling the void of a geode formed by layers of chalcedony. Amethyst is a violet coloured variety of quartz (silicon dioxide) that is often used in jewellery. This geode is roughly the size of a tennis ball.
Model release not required. Property release not available.