This magnificent artificially colored Calcite geode - Black Rock - Violet, offers its color once opened, the crystals that have formed in it are magnificent. Geodes are hollow stones, inside which crystals have formed. Each geode is therefore absolutely unique, and the result of a very long process of crystallization. Geodes can be difficult to find, because they are difficult to recognize on the outside and are lighter than solid stones. They are perfect as decorative objects, for example to collect and display them open. Geodes are always in style and super easy to sell. NB: The geodes and the crystals inside are painted. The average size is 8.5x6 cm and may vary as it is a natural product.