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Bologna stone

noun
variants: or Bolognan stone

Definition of Bologna stone 

: the mineral barite when found in roundish masses composed of radiating fibers, being phosphorescent when calcined with charcoal

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History and Etymology for Bologna stone

Bologna or Bolognan entry 1; from its discovery near Bologna, Italy

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Dictionary Entries near Bologna stone

bologna bull

Bologna flask

Bologna phosphorus

Bologna stone

Bolognese

bologram

bolograph

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