For other tablets, see Stone tablet.
The stone tablet is a quest item used in The Dig Site to find that the digsite was a temple dedicated to Zaros. Giving it to the archaeology expert finishes the quest. It is found from a cave that can only be entered with a chemical compound.
There is also a "read" option. It reads: "Tremble mortal, before the altar of our dread lord Zaros".
After a certain point in The Temple at Senntisten, you can no longer re-obtain the tablet due to the renovation of the temple.