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natural stone called Shadow Grey
"The stone is a quartzite called 'Woodbridge', purchased from Walker Zanger (approx $5.75 sq ft). It is extremely durable and does not require much up keep"
It's called Woodridge Quartzite. If is very slip resistant because of the texture.
Pennsylvania Blue Stone and it is laid wet in cement and then grouted but not sealed.
The paving material is a custom mix of two natural flagstones. The gray-blue stones are "Connecticut Bluestone Full Range", and the tan stones are called "El Dorado" (sometimes called "Oyster Thistle"
Bluestone - blue color, not full-range color.
Inexpensive Texas limestone in a Versailles pattern