It's rare nowadays to find a manga with beautiful and detailed worldbuilding such as this. (Some of the best worldbuilding manga/anime that i knew are: Made in Abyss, Kekkai Sensen, Log Horizon, Maoyuu Maou Yuusha, Re:Zero, Attack on Titan, etc, forgot the others.) this manga took a simple medieval setting and the concept of blooming gemstones as energy then skillfully combined both. That is why this has 10/10 worldbuilding.
Some people here mentioned that the MC is annoying. And i don't think that alone can lower my rating for this manga. BUT! Would she be interesting if we see some character development from clumsy troublemaker to dependable at later volumes? So i think that right now is too soon to rate the manga based on characters only.