A burl is a growth that develops on a tree due to damage or stress. It is characterized by a unique grain pattern that differs from the rest of the tree. Burls can vary in size and shape, ranging from small knots to large, round growths. To harvest burls, professionals use chainsaws or axes, taking care not to harm the tree. The twisted grain inside burls can make them challenging to work with, but their beauty makes them popular for a range of projects, such as picture frames, furniture, and household items like bowls and cups.
Despite the difficulties in working with burls, their distinctive patterns and durability make them highly valued in the woodworking community.