Three things never destroyed

Further, Mahamati, gold, vajra, and the relics of the Buddha, owing to their specific character, are never destroyed but remain the same until the end of time. If, Mahamati, the nature of enlightenment is momentary, the wise would lose their wiseness (aryatva), but they have never lost it. Mahamati, gold and vajra remain the same until the end of time; remaining the same they are neither diminished nor increased. How is it that the ignorant, failing to recognise the hidden meaning of all things internal and external, discriminate in the sense of momentariness? ~ The Lankavatara sutra