Tetrahedron (three triangles meet at each vertex)
Octahedron (four triangles meet at each vertex)
Icosahedron (five triangles meet at each vertex)
Hexahedron or Cube (three squares meet at each vertex)
Dodecahedron (three pentagons meet at each vertex)
In his work Plato linked the five platonic solids to the elements. Tetrahedron represents fire (also spirit), the cube earth, the octahedron is air (also can be seen as mental planes), icosahedron represents water (emotions) and the dodecahedron represents the constellations and heavens (universe). As a group the platonic solids are in balance and can be used in healing or simply in your home or place of work to give focus to the idea of bringing the four elements and the fifth universal element (some may call God) into balance within you.