Kirinite is a cast polymethyl methacrylate (PMMA), acrylic, which comes in a wide range of swirling colours and effects. Here it has been machined as a trumpet mouthpiece. It is also commonly used for knife handles and pen bodies.

Violin front and back. The soundboard (front) is quarter-sawn spruce rough shaped ready for tuning, and the back is figured maple.

Frederick Phelps violins in solid maple. The figured grain (flame) contributes to the superior acoustic properties of the violin, because it is interrupted and so does not resonate like straight grain.

While silver is the most common finish for a brass instrument mouthpiece, gold provides a tarnish-free surface that will hold its shine for longer. Maintaining a super smooth finish means the mouthpiece feels less 'grippy' and so can help with lip flexibility and control.
Relevant materials
Gold, Au, 24 ct, Pure gold

Clara compact concert ukulele from by Blackbird Guitars, made from Lingrove flax fibre reinforced epoxy. The soundboard is tuned for optimal rigidity and density without bracing, combining the tone of wood with the lightness and durability of composite. Image Blackbird Guitars.

Clara compact concert ukulele from by Blackbird Guitars, made from Lingrove flax fibre reinforced epoxy. The soundboard is tuned for optimal rigidity and density without bracing, combining the tone of wood with the lightness and durability of composite. Image Blackbird Guitars.

Farallon Ekoa tenor ukulele by Blackbird Guitars, made from Lingrove flax fibre reinforced epoxy.

Handmade trumpet, made with different types and colours of copper alloy, including brass (the colours are the result of different proportions of zinc) and nickel silver. The proportion of alloy affects the sound, with high proportions of zinc producing brighter tones, and less zinc (more copper) producing warmer tones.

Violin top made from carbon fibre composite, utilising unidirectional fabric construction. As well as being very light and stiff, the composite is unaffected by humidity, which means it will always give the same playing result.