They are geometrical forms which are said to act as a template from which all life springs. They are named after the ancient Greek philosopher Plato. To the Greeks, these solids symbolized fire, earth, air, spirit (or ether) and water.
Tetrahedron: has 4 triangular sides and symbolizes the element of fire. It is linked to the Solar Plexus chakra, the center for personal power and acceptance. The power of fire and the power present in the tetrahedron are beneficial for creating change.