<p>I don't really have a lot of evidence but I'm thinking that high class gems or warriors have visible pupils. Sapphire being valued by Blue Diamond has visible pupils. Jasper also has visible pupils and is a warrior gem......I don't really know tell me what you think. And leave Theories down below. :)
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<p>I think it could just be a design choice for characters, like how when we get a close up of Pearl when she's getting something out of her gem for the first time it shows her with pupils.
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