Beautiful polished geode for sale with quartz and amethyst crystals. Geodes are cavities covered with crystals on the inside Read more.
Geodes are cavities covered with crystals on the inside.
Quartz and amethyst geodes
The geodes on this page contain amethyst or rock crystals. Geodes are actually gas bubbles that were trapped in magma during a volcanic eruption. After solidification of the magma, crystals could grow in the cavities. This often happened after the formation of a layer of agate.
The geodes are found as spheres in the ground or in rock formations. There is often not much to see on the outside, but when opened, the beautiful crystals become visible.