Bible Dictionaries
Bluestone

Webster's Dictionary

(1):

(n.) Blue vitriol.

(2):

(n.) A grayish blue building stone, as that commonly used in the eastern United States.

Bibliography Information
Webster, Noah. Entry for 'Bluestone'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​b/bluestone.html. 1828.