A chance encounter in the acrylic scrap box led to a radioactive einstein:

That was so easy it’s gotta be either criminal or sinful.
A few test on scrap acrylic while tweaking the SCP warning label geometry showed only a few work well at such a small scale:

The mirror in the lower right got cut from the back side, making it the mmmm mirror image of the others.
IMO these would look and cut better in 1.5 mm acrylic, but it seems edge-lit acrylic only comes in 3 mm sheets.
They are absurdly fragile across the waist, but my admittedly limited exposure to fine jewelry suggests durability ranks low in the selection checklist.