Polished Gray, Black And Brown Petrified Wood SlabThis polished gray, black, and brown petrified wood slab is a beautiful, natural piece of home decor. Boasting a unique, polished gray, black, and brown finish, this slab is perfect for adding an organic, earthy feel to any space. The slab is perfect for adding natural beauty to your home decor. Petrified wood is made when wood goes through a process called permineralization, and water is an important agent. This process happens when materials from