1. Woods: Various types of woods are commonly used for different parts of the banjo, including the neck, rim, resonator, and fingerboard. Some popular woods include maple, mahogany, walnut, and rosewood.
2. Metal: Metal components are used for various parts of the banjo, such as the bridge, tailpiece, tension hoop, and tuning machines. These metal parts can be made from materials such as brass, nickel-plated brass, or stainless steel.
3. Synthetic Materials: Some contemporary banjos may incorporate synthetic materials, such as plastics, fiberglass, or carbon fiber. These materials can be used for the construction of the rim, resonator, or other components.
4. Natural Materials: In addition to woods and metal, banjos can also incorporate natural materials such as animal skin for the drumhead or bone for the nut and bridge.
The specific materials used in a banjo can affect its sound, appearance, and playability. Banjo makers often select particular materials based on their tonal properties and the desired aesthetic.