Hey Rog you had an interesting post here earlier, it unfortunately got raptured by a database backup.
The one about you and your friend on a rock, magnetic anomalies, lode stones and smelting operations.
It made me think of this fantastic story:
In Finnish mythology, the Sampo or Sammas was a magical artifact
of indeterminate type constructed by Ilmarinen that brought good fortune to its holder. When the Sampo was stolen, it is said that Ilmarinen's homeland fell upon hard times and sent an expedition to retrieve it, but in the ensuing battle it was smashed and lost at sea
The Sampo has been interpreted in many ways: a world pillar or world tree, a compass or astrolabe, a chest containing a treasure, a Byzantine coin die, a decorated Vendel period shield, a Christian relic, etc. In the Kalevala, compiler Lönnrot interpreted it to be a quern or mill of some sort that made flour, salt, and gold out of thin air
. The world pillar hypothesis, originally developed by historian of religions Upo Harva and the linguist Eemil Nestor Setälä in the early 20th century, is the most widely accepted one.