Spalting is simply a fungal discoloration of wood, not e separate species, it is found in wood that has begun initial stages of decay, and is then subsequently dried (preventing further decay). The partial decay, called spalting, can give the wood dark contrasting lines and streaks where fungus has begun to attack the wood. This piece was rough turned left to dry for several months and the re-turned and finished with multiple coats of a hardwearing and eco friendly hardwax oil. The Walnut threaded lid has a handcut 12tpi thread ensuring a secure closure.