Bole is a type of clay used in traditional pottery and art. It is often characterized by its reddish-brown color and is rich in iron oxide. Artists and craftsmen use bole as a base for gilding, which involves applying gold leaf to create decorative effects on various surfaces. In addition to its use in art, bole can also refer to the trunk of a tree, particularly in the context of botany. The bole is the main stem that supports the branches and leaves, playing a crucial role in the tree's structure and growth.