Here’s a simple gem with an elongated side. We used it for a costume.

One model has a flat bottom side that’s suitable for gluing.

Another model features loops that are ideal for attaching to string, yarn, or similar materials.

Prusa

i3 MK3

No

No

0.1 mm

10%

The print settings displayed are for gem.STL.

For gem_with_loops.STL, I used rafts and support structures.