Crystal Marrow is a resource that you will need to find and collect for quests and character development in Genshin Impact.
Where can I find Crystal Marrow in Genshin Impact?
Crystal Marrow is not too difficult to find or to farm, unlike other resources in Genshin Impact. It can be found on Yashori Island and Kannazuka Island, and it does not require a blast beforehand, unlike most other types of ore in the game.
The easiest way to get a lot of Crystal Marrow on Yashori Island is to follow the length of Orobashis bones. Start from the tail in the north, go along the skeleton, picking up the resource all the way to the head, then start all over again.
Clusters of Crystal Marrow are found just west of Tatarasuna, lower at sea level, rather up on the cliffs on Kannazuka Island.
In Genshin Impact, what is Crystal Marrow used for?
Crystal Marrow is a resource that is used only for the ascending of levels. It is not used to craft weapons or in any recipes, and no weapon can utilize it to ascending levels. Thus, all Crystal Marrow you collect would have to go towards ascending two Genshin Impact characters, Aloy and Sayu.