I know there are a lot I still don't have here (do have the rest of the arms manufacturers and other corporations lined up to go next, courtesy of scouring the Mass Effect wiki), so if you've got links to decent images of any others, please throw 'em my way.
ENGRAVE ALL THE THINGS.
I have no idea what to do with these when they're all done.
That is a neat concept. I bet That if the stones are small enough, you could turn them into brooches or magnets. I know that people used to paint landscapes on stones and make them into jewelry.
The largest ones measure maybe 5cm on the long axis, so they're not too big. They're made of glass though, so they're not quite as durable as proper stone. I don't quite trust the glues I have to not give out at the worst possible moment. I suppose wire-wrapping or that bead embroidery stuff would work, but I suck at both of those. (Mostly it comes down to Chim has too many projects alreadyaaahhhrtbgflggruhwejksklsdv. ) In any case, I'll probably wait until I have all the rest done before deciding one way or the other just what to do with them all.
I swear sci-fi has some kind of weird obsession with silvers and blues. Not that there's anything wrong with silver and blue; it would just have been quite boring if all of these were nothing but those two colours. The other ones lined up to go oh gods I just found five more on the wiki have a lot of greens and yellows, so that'll add some more variety. And also murder my hands after all the rest of the engraving I have to do, but what the hey.