thunderstone
nounEtymology From thunder + stone.
1
Archaic A thunderbolt.
2
A stone or fossil thought to be, or be caused by, a thunderbolt striking the earth.
- Thunderstones are sacred to the vodounist, forged as they are by Sobo and Shango, the spirits of thunder and lightning.1985, Wade Davis, The Serpent and the Rainbow, Simon & Schuster, page 94:
3
A belemnite.