Retaining walls are structures designed to restrain soil to a slope that it would not naturally keep to. They are used to bound soils between two different elevations often in areas of terrain possessing undesirable slopes or in areas where the landscape needs to be shaped severely and engineered for more specific purposes like hillside farming, roadway overpasses, housing developments or along the boundary of your property in your desired landscape design.
Basalt:
Blues and browns with textures of bluestone and honeycomb.
Castlemaine Sandstone:
Sandy yellows with some smoother textures
Coldstream:
Blues reds and browns matching in with fantastic with Australian natives with a sharper texture
Granite:
Browns blues and whites with a rough texture