Vajra or Dorje = The emblem of lightning.
Buddhism first appeared in India as a symbol of Vajrapani (lightning in hand), the special protector of Buddha Sakyamuni, being a direct loan from the Vedic God Indra ..
The Vajra symbolizes: indestructible, indivisible and irreducible power.
Other translations were diamond or royal stone. It is an expression of the adamantine quality (diamond hardness) of the Buddha mind.
The Dorje is the most important symbol of Vajrayana Buddhism.
The Vajra is responsible for the name given to this stream of Buddhism, but also is the true symbol of bodhicitta or enlightenment. First it worked as a weapon of destruction and then became a precious talisman of protection. Symbolizes faith, important rituals for exorcism of evil spirits. It is a common attribute of gods and lamas. In Tibetan art is shown as the attribute of various deities that hold it in one hand or near the body. It is a cosmic symbol: the cosmic pillar.
Thus it is an instrument for ritual use. The most powerful weapon of the gurus in their war against the demons, symbolizes the thunderbolt of Indra (Jupiter).
The Dorje was born as an instrument of God Indra and thereafter was used for tantric rituals and exorcisms. It was the chief tool of one of the great streams of Buddhism: Vajrayana.
Vajra or Dorje is a conception of the electromagnetic behavior of the Sun respect the orbiting planets .
For example: the Sun provides Earth, as a source of life “services” that are true lighting cycles. Photosynthesis and energy are supplied through controlled electromagnetic radiation, without these contributions the planet couldn´t exist for the development of all forms of life.
Therefore it is understandable that remote civilizations, had interpreted the significance of the astrophysics phenomenon. Then it was reflected in a symbol of highly significant spiritual worship, the Vajra or Dorje. This was inherited in Tibet and India as a final concept, with an unknown morphological origin and became a fundamental tool for religious rites of worship of Buddha and Indra, the Vedic god.