Meanings
nounBologna stone (plural Bologna stones)
plural Bologna stones · alternative Bolognian stone
- alchemyThe phosphorescent form of baryte.
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).
2013, Marco Piccolino, Galileo's Visions: Piercing the spheres of the heavens by eye and mind
Origin
Specimens were found near Bologna in the 17th century by Vincenzo Casciarolo.
Full word history & related roots →Cite this entry
APA
Bologna stone. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/Bologna%20stone
MLA
“Bologna stone.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Bologna%20stone. Accessed November 5, 2026.
Chicago
WatkinsX Dictionary, s.v. “Bologna stone,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/Bologna%20stone.
Source: Bologna stone on Wiktionary, CC BY-SA 4.0.