bluestone

[ bloo-stohn ]
/ ˈbluˌstoʊn /

noun

a bluish, argillaceous sandstone used for building purposes, flagging, etc.

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Origin of bluestone

First recorded in 1645–55; blue + stone
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for bluestone

British Dictionary definitions for bluestone

bluestone
/ (ˈbluːˌstəʊn) /

noun

a blue-grey sandstone containing much clay, used for building and paving
the blue crystalline form of copper sulphate
a blue variety of basalt found in Australia and used as a building stone
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012