Get close with NUT - NUT materials

There are a lot of materials can be used for nut i.e. plastic, bone, graphite, tusq, corian, brass, nickel etc.

Plastic
Usually found in low budget instrument. The color is white and made with injection molded machine. The tone is quite well but not as best as the other harder materials
Bone
A hard material with a vintage look, must be cut cleanly to keep strings from binding in slots. Made from cow bone which is almost luthier's favorite material. This hard material give a good tone contribution. The typical sound is bright and clear with detailed sound.

Graphite
It's black and also used for pencil. Genuine Graphtech self-lubricating material works well with tremolos and headstocks that do not have straight string pull through nut. The sound is warmer and even-soundingTusq
Synthetic material with a look similar to bone. The sound is warmer and even-sounding
Corian
Hard synthetic material takes a fine finish and is available in large oversized blanks. The sound is balanced, clear, even sound.

Brass
Hard material polishes well and looks good with gold hardware. Great sustain for bass and slide guitar playing. The sound is bright with very good sustain.

Nickel
Made of the same material as our fretwire (18% hard nickel/silver) so it matches sound & look of frets. Well polished. The sound is very bright with excellent articulation and sustain.