Bismuth

Bismuth is best known for making pretty, multicoloured "hopper crystals" and is a wonderful, safe and generally non-toxic introduction to the nature of metals and crystals, which in the end, obey the same universal laws and are more than just relatives in existence. Like the other metalloids, there is a whole lot more to it than meets the eyes, and bismuth particularly combines a great many "wonderful" properties of the other metals, crystals and metalloids, such as multi-faceted refraction, flow, regularity of structure and metaphysical expansion. An excellent metal/crystal for beginners and children.