1. What are they? Rare stones are luminous crystal stars. Their glow might be a sign of energy held within. 2. What is their origin? We know they only appear in treasure road. However, treasure road doesn't mesh well with the other areas, leading me to believe their home is another dimension, explaining their almost alien look. 3. Why are they important? Drawing upon the possible extradimensional origin and the odd glow, I believe the rare stones are creations of Fecto Elfilis, or at least from the same dimension.
