Gear
Gems and the jeweller
A gem goes into an item’s socket: it adds its own stat, and three identical ones are fused by the jeweller into one of a higher grade.
Gear
The jeweller’s work grows dearer with the hero’s level, and a stone cannot be pulled out without loss — the socket is a deliberate choice.
Everything here is taken from the game’s own reference — the same one a Keeper opens in town. Русская версия статьи.