Lovers in a Dangerous Spacetime

To obtain the Gemologist Achievement in Lovers in a Dangerous Spacetime you need to have 10 unused gems in your ship at one time. I did this in the prep area between levels and I just collected question blocks and left them wrapped up until I had 10 (actually a little more). Once you have 10 and before you start the next level you can unwrap them all and just throw them down and DO NOT use them or drop them near a turret as they run the risk of going into the slot when you don't want them to. I opted to carry them up near the map console and dropped them there to avoid mistakes. Once you ahve them all unwrapped you can build up your turrets and make progress towards Missile Kiss. After that just quit out and reload and you'll be in the room ready to go with wrapped presents again and you can progress towards finishing a campaign without using any gems.