'Bluestone' definitions:

Definition of 'bluestone'

noun

Bluish-grey sandstone used for paving and building

Definition of 'Bluestone'

From: GCIDE

Bluestone \Blue"stone`\, n.
1. Blue vitriol. --Dunglison. [1913 Webster]
2. A grayish blue building stone, as that commonly used in the eastern United States. [1913 Webster]

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