Grey William Marble: Grey William is a sedimentary rock from Italy that ranges in color from brown to grey. The versatility of this stone makes it ideal for a wide variety of decorative uses, including but not limited to: exterior and interior wall and floor applications; countertops; mosaics; fountains; pool and wall capping; and more. We manufacture the best-quality engineered marbles. Moreover, we offer the widest range of exclusively unique choices of natural stones for your home décor. Rynestone has demonstrated excellent expertise in dealing with high-quality marbles and natural stones.