Dragon stone, also called Ohko rocks are fragments of naturally grown rocks. The strongly structured surface allows succulent plants, such as Mexican pinguicula, to take root in the stone in the best possible way and to find a strong hold.
Small = One or two stones about a hand tall (5-15cm).
Large = a large stone (15-30 cm)
Note: Since dragon stones are a natural product, the shape, colour and, above all, the size of the stones can vary more widely from one another.