Examples from the Web for flagstone
They built a redwood garden fence and installed a flagstone court and sidewalks.
The flagstone quarries, mostly situated in the Thurso, Olrig and Halkirk districts, are another important source of revenue.
It would be right to send you to your own place on the flagstone of the traitors in hell.The Unicorn from the Stars and Other Plays|William B. Yeats
It was quarried near Middletown, in 1778, and for sixty years did duty as a flagstone, fortunately with the face downwards.Animals of the Past|Frederic A. Lucas