Petrified wood is made of stone. It would best be polished with a diamond wheel.
Petrified wood is now mineralised and turned into rock. It can be polished but to do this you must treat it as you would when you want to polish a granite worktop, it is a job for a stonemason.
Petrified wood has turned to stone, a type of fossil, It is unlikley that you would be able to burn it.
Petrified Wood
The streak of petrified wood is black or brown. The streak can also be white.
...the petrified forest...
petrified wood
Petrified wood.
Petrified wood rates between 7 and 8 on Moh's Hardness Scale
It would be exceedingly unlikely.
The Petrirfied Forest is a forestis petrified that petrified by wood in the Petrified Forest. Wirten By Valeria Roman Barrios 23
Petrified wood is the state stone of Mississippi. This was designated in 1976. Mississippi contains a large petrified forest park and museum.
Petrified wood is usually silicified. Specimens could be washed with a mild detergent, small brush and plenty of water and left to dry naturally. Most petrified wood would be naturally resistant to weathering.