graystone

Noun

1. A type of gray volcanic rock, typically containing feldspar and iron.
2. Any type of gray stone, such as limestone, used in building.
   • I certainly was not prepared for the cosy nestling valleys that snuggled against the shoulders of the hills; a land where the graystone cottages and farmsteads still prevailed, but where they had taken on something of...
   • Founded almost 50 years ago, it's an imposing graystone structure (formerly a park district office). - 2009 January 4, “Letters: Mr. Obama’s Neighborhood”, in New York Times:
3. A building of this kind.
   • Because graystones were more expensive to build than frame buildings and had a more substantial look and feel, they were the choice of the middle and upper classes. - 2017, Terry Moor, Reinventing an Urban Vernacular: