| 	 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.  	 |