Petrified Wood 10mmColors of browns, beige, and cream throughout this stone. Although, this gemstone is called Petrified Wood, it is actually not wood at all; rather, the minerals have replaced and taken on the appearance of the wood that was once there. There are several reasons why Petrified Wood is so special. The first reason is that it is a fossilized stone that is millions of years old yet it still retains the same shape as it did in ancient times. Another reason