Petrified Wood Slab, Madagascar (with stand) 4b22319f36edbcad6fd0674fa3989e4c 90% of the U

90% of the U

There are three main theories of Neanderthals extinction

allowing us to envision a world of simplistic wonder

Carnelian is one of the oldest minerals that has been used as a gemstone

Lake Superior Agates are the state mineral of Minnesota

Petrified Wood Slab, Madagascar (with stand) 4b22319f36edbcad6fd0674fa3989e4c 90% of the UFrom ancient Greek meaning "wood turned into rock", Petrified Wood is an unique form of fossilization. In some instances all the organic matter has been replaced by minerals (usually a silicate, such as quartz) during a process called permineralization replacement. However, many petrified wood specimens undergo a unique fossilization process, where silicates bond with the cellulose structure of the wood, thereby preserving organic matter. Regardless