The World Inside Petrified WoodThe World Inside Petrified Wood Is a slice from an Ancient Sequoia tree, the growth rings are beautifully preserved. The slice is superbly to polished to a mirror finish. Petrified wood is made up of almost solid quartz. The colors are produced by impurities in the quartz, such as iron, carbon, and manganese. Over 200 million years ago, the logs washed into an ancient river system and were rapidly buried deep enough by sediment and debris also carried