Bologna stone
English edit
Alternative forms edit
Etymology edit
Specimens were found near Bologna in the 17th century by Vincenzo Casciarolo.
Noun edit
Bologna stone (plural Bologna stones)
- (alchemy) The phosphorescent form of baryte.
- 2013, Marco Piccolino, Galileo's Visions: Piercing the spheres of the heavens by eye and mind:
- It was concerned with the causes of the phosphorescence of the so-called 'Bologna stone' (a mineral named by the author of the book with the more imposing term of litheosphorus).