The Grain of Aerosiderite is a primary weapon ascension material in Genshin Impact. This page contains information on where to obtain Grain of Aerosiderite and what weapons it can be used for ascension.
|Grain of Aerosiderite|
|Item Type||Weapon Ascension Materials|
|Obtained From||Hidden Palace of Lianshan Formula|
|Availability||Wednesday, Saturday, Sunday|
|Purchase From||Souvenir Shop in Liyue|
|Other Source||Parametric Transformer|
A black meteor once fell beyond Liyue’s Sea of Clouds, said to have fallen to vanquish a monster. However, it was stained by powerful tainted blood, so this item no longer possesses the pure power of Rex Lapis.