I’m confused how they’re rolling are they not faceted?
I use packing tape but also sometimes I just use a table and move things around with a tooth pick as to not move them about too much.
I don't know what it's called in the US but do you have something called BluTack? It's something you can put posters on the wall with that doesn't mark the wall. You can get a blob of that and push in your stones - it doesn't harm the gems or scratch them.
For anything other than color,
(Because seem to have butterfingers)
I snap a picture and play with cut/paste apps. Adobe photoshop sketch, or more rudimentary one, you doodle
love the idea of the clear gummy top boxes, tho