Intelligently Mixing Hardscapes A blend of small blackstar gravel, large, chunky blackstar gravel, and turf come together with a definitive border of metal edge, adding contrast and visual interest in the hardscape. The smaller blackstar gravel area acts as a wonderful overflow parking area, and the size of the gravel allows for effective mulching and spread of these new plantings. Beneath the gravel, honeycomb NDS gravel pavers add stability to the space and discourage gravel shifting and wash-out.