Natural hardwood products are never as uniform as plastic laminate or wallpaper found in a catalog. Solid hardwood products, like other natural products, are shaped by natural forces and may display a variety of character markings and colors. Each wood specie has unique features such as density, colors and grain patterns. Color variation is influenced by moisture, exposure to sunlight and mineral content of the soil. Grain patterns are affected by changes in climate, growth rate, damage, as well as soil conditions. Different saw cuts also help determine the grain pattern and color. All woods change color over time and the change varies depending on species, exposure to natural light and the amount and color of finish applied, among other things. All of these variations contribute to the uniqueness of the beauty and essence of natural wood.