"When shall we three meet again?
In thunder, lightning, or in rain?"
"Macbeth" Act 1, Scene 1
2. - The Thunderstone
Already the Roman scholar Pliny describes them as "Idaei dactyli" (the fingers from the mountain Ida). In Germany until the early 20th century people believed in the magic properties of the devils fingers, known also as catstones, thunderstones, wombstones or even candles of the dead. According to ancient lore these strange stones are falling from the sky and witches can use them to cause thunderstorms.
Another myth interprets these fossils as petrified lynx urine. In fact rubbing the stone a smell of ammoniac or decomposed organic matter can be perceived, also the color of some fossils - yellow or brown, as found in the cretaceous sediments from Northern Germany - maybe explains this strange connection.
Today the belemnites are reclassified as the internal shells of extinct mollusks.