A ferrispec product widely used in the pigmentation of concrete products, including the following: architectural masonry blocks and bricks, segmented retaining walls and garden units, interlocking pavers, patio blocks, stucco, grouts, mortars and roof tiles, asphalt pavements and roads, asphalt roofing shingles, and ready-mixed concretes. They can be safely used in amounts up to 10% by weight of cement without affecting concrete strength.