I think you can look that up in the Create A World Manual. I don't think its been updated for Ambitions yet, but it shouldn't matter in this case. Both of those things were in the core game, so it should tell you which spawners to use. Plus I think there is a spawner called, palladium which only spawns palladium. Unfortunately its not available for lots for some reason, only the map, and I don't think that you can add spawners outside of lots, anywhere except in Create A World.
I know this is a little late but I'm having trouble. I typed in 'testingcheatsenable true buydebug on' and I got the spawner. I am only given the option to place the spawners on my lot. I put three spawners down but whenever I go to map view and click on the blue gem circle that I see when I use the collection helper, I never get a pink gem. I read on a different post that the epic spawner spawns the pink diamond but I've yet to see one. Am I doing something wrong? I waited one sim day to see if I would see some but the only gems that I see are the ones that were already on the ground before I even got the spawner. Please help me.