Discover the hidden costs behind marble TV walls. This guide reveals how stone grade, origin, and installation complexity dramatically impact price, often leading to a 3x difference for seemingly identical materials. Learn to move beyond the 'same name' myth and make informed decisions by visiting stone yards, demanding site surveys, and understanding the true value of your investment. Discover the hidden costs behind marble TV walls. This guide reveals how stone grade, origin, and installation complexity dramatically impact price, often leading to a 3x difference for seemingly identical materials. Learn to move beyond the 'same name' myth and make informed decisions by visiting stone yards, demanding site surveys, and understanding…