I don't think Amethysts have any fire powers outside of being able to ignite their weapons and I think Amethyst has done that only once. However, it's true that Yang's personality is a lot like Amethyst's. You're right, Rubies are probably too common and weak for Yang, so she would indeed be an Amethyst or possibly a Jasper. We know now that not all Jaspers are jerks and a Jasper would also suit Yang's color better.



As for Weiss, I actually think that a Pearl would suit her better than a Sapphire after all. Remember, Weiss's Semblance isn't really ice powers. She uses Dust to create ice with her Glyphs. Pearls can hold stuff in their Gems, which is a little like summoning allies with Glyphs, right? As for Pearls being slaves, Weiss would naturally be a free rebel Pearl. Weiss is clearly about to rebel against her father in RWBY, isn't she? The more I think about it, the more it makes sense!



Yeah, Blake's Gem version is a mystery for now. Her personality is most like Lapis's, but we don't really know what most Lapis Lazulis are like and her color and Semblance are all wrong.



You should totally do that. XD However, I don't really see Pyrrha as a Peridot. I don't see her as a Rose Quartz, either, even though their personalities are a perfect match. In my headcanon, Ruby will always be a Rose Quartz. Weiss is a Pearl, Yang is a (nice) Jasper and Blake is a Gem we have not seen yet. I suppose there is no Garnet in that group, unless Yang-Jasper and Blake-??? love fusion as much as Ruby and Sapphire. I guess there is no Amethyst either, unless it's Nora. Could you see Nora as an Amethyst? Their personalities are not that different and they both love to eat.