In this video, we show you all 7 locations of the Stone Slates, and how to solve the puzzles. You will need the Peculiar Pinion gadget, which you get on Day 2 of the main world quest chain for Tsurumi Island (version 2.2).
You will get the Achievement called Seven Letters, and 2 Exquisite Chests at the end. I recommend you to go to location and try the Puzzles for yourself first, then take a peek at the video hints if you are stuck, as they are not too difficult, but take time to savour and enjoy.
You have to unlock Shirikoro Peak underground cave system first, watch my previous video on how to do it:
• Shirikoro Peak Full Walkthrough & Guide - ...
For Mural + Torch Puzzles under Shirikoro Peak, check out this video:
• Shirikoro Peak Tsurumi Island | Star Shap...
My GAG Discord Server(Open to All) invite link is: https://tinyurl.com/genshinGAG
TIMESTAMPS
00:00 Intro
00:21 Slate 1
03:16 Slate 2
04:27 Slate 3
04:59 Slate 4
06:50 Slate 5
09:00 Slate 6
10:11 Slate 7
16:30 Final Reward