This is a guess work.
I've been seeing many wire wrapped bead caps; they are intricate and unique. My favorite so far being the ones by Iza Malczyk! They are absolutely fantastic!
Since I had played with basket weaving before, I thought to give it a try before reading the tutorial. Here's my first try: 18g copper wire as frame, wrapped with 26g thin wire, capping a wooden bead. What do you think?
Here are 2 more images:
on the back