Or it can be a complete cast of the original piece of wood, with no detail of cellular structures at all. There are many sites where the petrified wood will also have or be agate/chalidone (the 2 terms are considered synonyms, and are mostly regional in use.) the preservation can be very good, showing the minutest details of cellular structures.
Warren woods baptist church
Wood and cane coffee table
Tiger woods in the us open
Petrified Wood Rough Crystal Agatized Wood Fossilized Wood