Tennessee Crab Orchard comes in warm tan or gray colors. Crab Orchard stone is popular in both commercial and residential building applications. Its gritty, non-slip surface and brilliant-when-wet colors make it a popular choice for pool decks, walkways, flooring, patios, and stairs. This is the most popular stone for patios and walkways because of its relatively consistent thickness and relatively smooth surface. Flagstone steppers (step treads) are pieces of rectangular flagstone typically used for stair steps.