Researchers from Tel Aviv University have manufactured a new type of glass made from peptides. It is recyclable, self-healing, optically transparent, and can also act as a glue. If cracked, it will repair itself on contact with moisture. It can be used for spectacle lenses and much more.
https://www.jpost.com/science/article-807777
https://www.youtube.com/watch?v=g5SaghcgK4s