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 | |
| Rarity | ★★ | |
| Obtained From | Hidden Palace of Lianshan Formula | |
| Availability | Wednesday, Saturday, Sunday | |
| Purchase From | Souvenir Shop in Liyue | |
| Other Source | Parametric Transformer | |
Descriptions
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.