Final answer:
Vajrayana Buddhism is indeed referred to as the Diamond Vehicle, emphasizing the indestructible quality of its teachings.
Step-by-step explanation:
The statement that Vajrayana Buddhism is also referred to as the Diamond Vehicle is True. Vajrayana, often associated with Tibetan Buddhism, involves various spiritual techniques and meditation as its core practice. It forms a part of the broader Mahayana Buddhism tradition. The term 'Diamond Vehicle' is indeed another name for Vajrayana, highlighting the indestructible and clear nature of the teachings, much like a diamond.