Vajra Tank TopVajra is a Sanskrit word meaning both thunderbolt and diamond. Additionally, it is a weapon which is used as a ritual object to symbolize both the properties of a diamond (indestructibility) and a thunderbolt (irresistible force). The Vajra is representative of upaya, (skillful means) It consists of a spherical central section, with two symmetrical sets of five prongs, which arc out from lotus blooms on either side of the sphere and come to a point at