Three Star-Shaped Gems are scattered throughout the Shirikoro Peak underground in Tsurumi Island. When these gems are collected and inserted into certain murals, a treasure chest spawns. To find ...

The following Star Shaped Gem location is next to the last one. To find it, turn around and look at the wall with a bird mural on it (it should be to the player's left like in the above image).

Genshin Impact star shaped gems are a necessary part of the Tsurumi Island quest chains. ... The first Seelie is near the Shirikoro waymark location, and the second is at the peak of Mt. Kanna.