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 
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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.   
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