The mosaic is made on a plywood substrate, it can be hung on the wall as a picture, or mounted as a panel.
Smalt, mosaic, and art glass were used to create the mosaic. As a binding material, was used a special mix for mosaics with an insulating material, which gives the product the necessary elasticity. For the artwork natural materials were also used - shells and sea pebbles.
Reference. Smalt — colored opaque glass made by special smelting technologies with the addition of metal oxides, as well as pieces of various shapes obtained from it by splitting or cutting. Mosaic in the modern concept is called a ceramic tile of different colors or with an already applied pattern. Art glass is a broad concept, in this case it is colored glass, but obtained using a slightly different technology than smalt.
All these materials are used when creating mosaics both in composition with each other, and for "mono" techniques.