>>22574175Honestly I'm just now realizing I never got around to explaining them properly. It's essentially the only thing I'd consider magical with Rosebutas, it grows off of the same plant that births them and can be used to provide heat and light. The stones grow hotter and brighter when friction is applied, but will spark or even explode if rubbed against each other too violently. In other words, it's their light and heat source for surviving in their cold and/or dark environments.