Physical Properties: Crystal System: Trigonal Chemical Composition: Fossil wood replaced by Chalcedony and sometimes also by Opal, Coal, Pyrite and/or Calcite. Mineral Class: Silicates Hardness: (7) Color: Brown, Black/Brown, Cream, Tan, Red, Yellow Rarity: Common | | | Metaphysical Guide: Primary Chakra: Root, Sacral, Solar Plexus Astrological sign(s): Leo Vibration: Number 77 Fossilized Petrified Wood, which is also known as Agatized Wood, forms when a tree has died and silicon dioxide forms in place of the wood that degrades until there is no wood left, only Quartz | More Info >> | |