The colors found in Arizona Petrified Wood are the result of various elements present in either the original wood or the silicate.
Red and Orange are caused by iron. Yellow and Brown are caused by iron and uranium. Green is caused by iron, copper, cobalt, chromium, uranium, and nickel. Blue is caused by copper, manganese, cobalt, and chromium. Violet and Purple are caused by manganese and iron. Black is caused by manganese, carbon, and iron. White and Gray are caused by silicon dioxide.
Red and Orange are caused by iron. Yellow and Brown are caused by iron and uranium. Green is caused by iron, copper, cobalt, chromium, uranium, and nickel. Blue is caused by copper, manganese, cobalt, and chromium. Violet and Purple are caused by manganese and iron. Black is caused by manganese, carbon, and iron. White and Gray are caused by silicon dioxide.