Dadhichi, also rendered Dadhyanga and Dadhyancha, is a sage in Hinduism. He is best known for his sacrifice in the Puranas, where he gives up his life so that his bones could be used to manufacture the Vajra, the diamond-like celestial thunderbolt of the deity Indra, in order to slay Vritra.
Dadhichi, featured on an Indian stamp
The Vajra is a legendary and ritualistic weapon, symbolizing the properties of a diamond (indestructibility) and a thunderbolt.
A Tibetan vajra (club) and ghanta (bell)
Mahakala holding a kartika with a half-vajra handle
Indra's vajra as the privy seal of King Vajiravudh of Thailand
Five Vajrayana ritual objects at Itsukushima Shrine: a five-pronged short club (vajra) (五鈷杵, gokosho), a pestle with a single sharp blade at each end (独鈷杵, tokkosho), a stand for vajra pestle and bell (金剛盤, kongōban), a three-pronged pestle (三鈷杵, sankosho), and a five-pronged bell (五鈷鈴, gokorei).