Originally associated with the Vedic god Indra, the Vajra (Sanskrit), or Dorje (Tibetan) is a tool wielded by various Hindu and Buddhist deities, and used in ceremony by Buddhist monks.
The Dorje is a lightening bolt of consciousness that disintegrates ignorance, and is also referred to as a diamond, representing indestructibility and the power of spirit.
Photographed is a double Dorje, though they are typically seen with two ends rather than four. The double Dorje, or Vajra Cross, is used to provide an immovable foundation and powerful protection.