Petrified Wood (Rainbow Wood) Rough from Arizona - $3.50-$7.00/lb
Petrified wood is agatized replacement of fossil wood. It cuts and polishes like agate. So, it takes a fine polish with cerium or tin oxide, but will also polish well with diamond. It is common for this material to have fractures. Mohs hardness 7.

Example of a Petrified Wood Cabochon
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