A burl is a tree growth in which the grain has grown in a deformed manner. It is usually found on the trunk, at the base of the tree, and sometimes underground in the form of a rounded outgrowth. It is caused by some kind of stress, such as injury, virus, fungus, insect infestation or mold growth.
Burl wood is the wood that is harvested from that growth, and it holds hidden treasures of unusual design. Burls result in a uniquely patterned wood, which is highly prized for its beauty. It is valued and sought after by artists, furniture makers and sculptors.
I only curate burls from salvaged wood and from tree who died from old age.