Tokcha or Thokcha is a term applied to small copper alloy talismanic forms worn in Tibet. The term tokcha derives from the Tibetan thog (thunderbolt) and
Icags (iron or metal), so literally can be translated as 'thunderbolt iron' - according to belief, tokchas were formed when molten thunderbolts struck the earth
and reacted forming the metal used to cast tokchas.
This example is of the popular Tibetan Dorje or Thunderbolt represents the "thunderbolt of enlightenment"
which is used as a ritual object to symbolize both the properties of a diamond (indestructibility) and a thunderbolt (irresistible force)..