Once opened, the crystals which form inside these unopened geodes 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, as they are difficult to recognize on the outside and are lighter than solid stones. They are perfect as decorative objects, for example to collect them and display them open. The average size might vary as it is a natural product.
