There's a interesting YT video that has some connections to Prometheus with secret occult societies and religions. Notably the Moldavite stone referred as the holy grail stone, philosophers stone or stone of destiny.
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Moldavite (Czech: Vltavín) is an olive-green or dull greenish vitreous substance possibly formed by a meteorite impact. It is one kind of tektite. They were introduced to the scientific public for the first time in 1786 as “chrysolites” from Týn nad Vltavou in a lecture by professor Josef Mayer of Prague University, read at a meeting of the Bohemian Scientific Society (Mayer 1788).
According to the video the stone was part of a crown broken off during a battle in heaven.