The Reich der Kristalle (The Empire of Crystals) contains a glittering display of diamonds, rubies, sapphires and other jewels, accompanied by fascinating explanations of how such precious stones are formed. In fact, the 'Universe of Crystals' would be a more appropriate name, as there is also a fascinating section devoted to meteorites. The star among the 20,000 exhibits is the breathtaking Takowaya Emerald. Temporary exhibitions are frequently organised.