And these rarities are often described as 'Karelian' due to the sound ingrown bark
, which creates a pleasing figure type that is much more common with the birch found in the special areas of Finland.
These species tend to have a rich and varied grain, with abundant knots, mineral streaks and even ingrown bark
The burl character is unique in the fact that it is more like an ingrown bark
than the true burl you see in maple, madrona, walnut, Carpathian elm and other burls.