Mokume-gane
Mokume-gane is a Japanese metalworking technique in which differently coloured metal layers are bonded and worked into grain-like patterns. Its name refers to the appearance of wood grain. Used for decorative metalwork and jewellery, it identifies neither a particular gold fineness nor a single maker.
How the pattern forms
Controlled heat and pressure join the layers. Cutting, drilling, hammering or rolling can then reveal different depths within the stack. The pattern is formed in the metal rather than simply engraved as surface lines. Metal selection and any patination affect the colour contrast.
What to check
A wood-grain appearance alone does not establish the technique. Ask for information about construction, constituent metals and workshop. Do not confuse mokume-gane with inlaid decoration or a printed pattern. Before purchase, inspect for cracks and signs of separating layers. Avoid abrasive refinishing or repatination until the materials are understood, since these can alter the pattern and surface.
Sources
The Metropolitan Museum of Art: Mokume-gane; Japan Mokumegane Research Institute: Technique.
