Spalting

Spalting is any form of wood coloration caused by fungi. Although primarily found in dead trees, spalting can also occur under stressed tree conditions or even in living trees. Although spalting can cause weight loss and strength loss in the wood, the unique coloration and patterns of spalted wood are sought after by woodworkers.

Read more about Spalting:  Types, Conditions, Commonly Spalted Woods, Common Spalting Fungi, Spalting Research