bluestone

Bluestone is a cultural or commercial name for a number of dimension or building stone varieties, including:

basalt in Victoria, Australia, and in New Zealand
dolerites in Tasmania, Australia; and in Britain (including Stonehenge)
feldspathic sandstone in the US and Canada
limestone in the Shenandoah Valley in the US, from the Hainaut quarries in Soignies, Belgium, and from quarries in County Carlow, County Galway and County Kilkenny in Ireland
slate in South Australia

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