3. I've shown this here before, but it's one of my favourite possessions and I have to show it again: a beautiful piece of Neolithic jade from Ban Chiang in what is now Thailand, originally part of a jade bangle (2000 BCE) that broke, then drilled as a bead which also broke, and then repaired (200CE approximately) with a gold plate and rivets.

4. An amber bead (36mm) from Maroc, repaired with staples and a wound white metal silver ring.