Burr Walnut also known as figured Walnut is a highly prized wood which is formed by a growth deformation resulting from stress, disease or nurturing the tree in a specific way. Burr can be developed by blocking the sap flow of the tree by means of putting a French Walnut on top of the roots of an American Walnut. Due to the unusual properties, it is rare to come across a Walnut tree growing this way in the wild. Nurturing planted trees takes at least 80 years before it is mature enough to be cut for good purpose. Burr Walnut is highly desired for their unusual grain and pattern, used mostly in veneering larger pieces such as furniture would be joined by matching the veneer pieces or blending them together.