Bolognian stone

See Bologna stone, under Bologna.

See also: Bolognian

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
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Quite appropriately, another case next to the Mazzoleni display dealt with the Bolognian stones: nodules of barite that used to be found, and still can be found sparingly, in the hills around the city.