I designed this jewel holder so that I didn't have to pay £18 for one online, and this also meant that I could customise it, and let others use it. Your medal pin slips in the top and anchors in the centre, with a cutout for the connection to the jewel, then you can slip it in your jacket pocket.
I am by no means any good at CAD, I've been taught everything I know by my partner, who is much better than me! I'm sharing my designs so that if someone finds them useful, they can use them, modify them, print them, or whatever it is that you wish to do with them, feel free! Therefore, all my designs are released under the Creative Commons Attribution-ShareAlike 4.0 International license, do what you like with it, use it where you want, just make sure that you credit my original work.
All work is licensed under CC BY-SA 4.0