In Buddhist contexts, refers to the indestructible, diamond-like substance or truth. Also used metaphorically for something extremely hard or unbreakable.
金剛石 means diamond.
His will is as firm as adamantine.
thunderbolt; Indra's weapon; Buddhist symbol
Specifically refers to the vajra as a ritual object or symbol in Buddhism, representing indestructible truth, or as the weapon of Indra in Hindu mythology.
In esoteric Buddhist rituals, a vajra scepter is used.
The Diamond Realm Mandala is an important iconographic depiction in esoteric Buddhism.