This jewellery box is a handmade piece, crafted out of wood and veneered with rosewood and ebony. Due to the symbology of the Platonic solid used to build the lid of the jewellery box, the cube, the author called it Symbol of Earth.
Geometrically, the Symbol of Earth is formed by a regular triangular prism - the jewellery box body - and a cube - the lid. In the closing process, the cube is partially inserted into the triangular prism, with one vertex remaining inside the jewellery box body and the remaining vertices on the outside. In the opening process, the lid completely separates from the body of the jewellery box and reveals the cube.