Profile: State Material Mason Supply supplies differenr types of stone, brick, concrete and building material. Pavers & retaining walls are used in patio, pool area, walkway, driveway, wall area & gardens. We have a complete line of interlocking concrete paving stones and segmental retaining wall systems, architectural paving slabs and precast concrete products. Brick & thin brick can be designed for use in walls, walkways, buildings and fireplaces.