crushed black marble gravel. Granite Aggregates | Lowery Sand and Gravel Company . Crushed granite (and our other granite aggregates) are crushed hard rock composed of a granular structure known for solidity, low flake levels, and frost resistance.
This stone is crushed to size, so it is jagged around the edges. Ninety percent of the stones are red, blue and grey in color. Use for any type of decorative purpose. For an estimate on how much Gull Lake Stone you need, click here. Black Granite