Still messing with this, but this is what I printed earlier:

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Phone camera has clearly decided to focus on an area other than the one I pointed to. Also, the colour of the resin is revolting - I've been adding black to yellow to improve the behaviour.

As mentioned elsewhere, the holes in the ring have been generated from a script. There's a few things I want to tweak about it, including evening out the hole sizes between the narrow & wide parts of the shank but overall it's mostly worked.

This is the maths behind it - https://en.wikipedia.org/wiki/Voronoi_diagram

Now... I wrote the script to do the work, tweaked the script to give a more aesthetically pleasing result, built the ring in CAD, printed it. Is it handmade? Or handcrafted at least?
If you use a pendant motor or micromotor in your work, is it handmade?

I could have just as readily done something similar in wax - wouldn't be as precise according to the maths, but it would look close enough. I couldn't tweak the pattern as easily, I couldn't redo it more-or-less instantly for a different finger size and I couldn't do a run of them.