With Octave of the Maushiro unlocked in Genshin Impact, the Peculiar Pinion gadget allows you to search for the Tsurumi Island Stone Slates. It’s related to the Ishine script, with 7 slates in total to find. The order given below was just how we did it, but you’re free to find a more efficient route.
SLATE 1
The stones will be at the cliff edge south of the Moshiri Ceremonial Site, where you can also find a Remarkable Chest. An Electro Seelie will spawn to lead you to the order of the script, the order starting from left to right.
SLATE 2
Head into Mt. Kanna and make your way towards the back. You need to find 3 missing stones before you can complete the string. Use the feather on the statue to spawn 3 seelie, which will lead you to the stones. Go ahead and pick up the Electroculus in the area as well. Hit the stones in the order from left to right.
SLATE 3
You’ll find this one at the arena north of Shirikoro Peak. Using your experience from Oina Beach, you need to move the stones into the right places. There are 2 empty lanes which you can shove the stones into to get them out of the way as you shuffle the rest around. You can try and put the stones with the symbols closest to the off lanes so that you have space for the others.
SLATE 4
This one will be near Chirai Shrine. Find this statue to use the feather on to make the letters appear.
The order you need will be shown by the statue here. Using the feather will reveal a mechanism behind it. The order you need to hit it in will be shown on the ground when you activate the mechanism, phasing in and out.
SLATE 5
The layout and the order you need will be at the bottom of Shirikoro Peak. The first letter and hint wants you to start from the “gaze”, so from the hint location, and following the statue heads’ orientation.
WHILE YOU’RE HERE…
First, use the feather on this statue to spawn Electrogranum to go through the nearby barrier for a combat challenge. You need to defeat 4 Ruin Sentinels in 70 seconds for the Precious Chest.
Next, you’ll be able to drain the water to the next area. Using the feather on this statue will spawn torches. The hint is on the wall on your right. You will get an Exquisite Chest, and the next statue. Using the feather will reveal a mechanism to drain the water.
Follow the path to another challenge to defeat 2 Ruin Guards and 1 Ruin Grader in 120 seconds. Your reward, once the door opens, will be a Precious Chest.
SLATE 6
This one north of the Moshiri Ceremonial Site will begin from this statue. Using the feather will activate the other statues to use the feather on down the path, which is also the order you need to hit the stones in.
SLATE 7
The slate can be found at the islet west of the Wakukau Shoal waypoint. It’s another one where you need to shove the stones around to the correct locations. You’ll have to slowly move the stones from one end to the other, making use of the lanes along the way.
COMPLETION REWARDS
You’ll need to place the slates in the pedestals lining the room’s walls at the bottom of Shirikoro Peak. You would have likely already been here for the Electroculus.
You get the Seven Letters achievement when you place all the slates, and two Luxurious Chests would spawn.
With that, you’ve collected all the spoils the Tsurumi Island Stone Slates have to offer.