The Vajra, also known as Dorje in Tibetan, is a symbolic ritual object in Tibetan Buddhism and other Vajrayana traditions. It is a sacred implement that represents both the indestructible nature of reality (diamond-like clarity) and the method for realizing that nature (thunderbolt-like force). The Vajra is often used in various rituals, ceremonies, and meditation practices.
The Vajra is characterized by a central sphere with spokes emanating from it, creating a powerful and symmetrical design. It symbolizes the union of wisdom and skillful means, as well as the unshakable nature of enlightenment. In addition to its use as a ritual object, the Vajra is also employed as a gesture in certain mudras (hand gestures) used during meditation and ceremonies.
"999 silver" refers to the purity of the silver. 999 silver signifies that the silver is 99.9% pure. This means that out of every 1,000 parts of the metal, 999 parts are pure silver.