So here's the thing no one is mentioning and I'm not sure anyone understands one way or the other:
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So that's the lab font. Looks like Merc lab. That second line SEEMS to imply that it takes the gem you put in, and gives you a Transfigured version
OF THAT GEM. For most of the gems there's one version and some two. This doesn't seem like the gems will be rare at all unless for some reason one version has a 80% occurrence and the others have 20% or something dumb like that. I'm also fairly confident that that is recipe we'll see in NORMAL lab as it means you can only blast gems you'd have access to at that time so it makes sense mechanically.
If this is the case, which I think it is, this whole "if we can get the gem" thing is nonsense. I don't think these are supposed to be rare like alt qual, they're just new gems without them having to add new gems. We're SUPPOSED to have access to them as they feel they're all appropriately balanced versus the normal gem rather than just straight "gooder" like several alt quals were.