Crimson Bark is flora in Avatar: Frontiers of Pandora.
Due to the unusual mineral quality of braided crimson tree sap, crimson bark has a stony texture that makes it extremely hard and difficult to fashion.
Bark is the tough outer coating of plant stems, roots and trunks. The Na'vi have learned to gather bark "galls," knotty swellings on the plant surface caused by natural damage. This gathering helps heal the tree and the bark is used to craft a variety of Na'vi gear.