I usually spread a bag of new stone dust in the cracks after a good cleaning. (eileenandersonrealtor.com)
The surface is packed stone dust with some boardwalk. (massaudubon.org)
A colossal enlargement of a microscopic life - form, Cuoghi's sculpture was made by a 3D printer, then coated in so much stone dust that it is unrecognisable as anything at all, except perhaps a monument to futility. (theguardian.com)