Once a gem has enough experience to level up, it will stop gaining experience and a level–up icon will appear on the right of the screen and in the inventory menu. Left–clicking it will level up the gem, right–clicking the icon will hide it on the side of the screen, but it will still be accessible in the inventory menu. Not leveling up a gem is useful in some situations in hunting for POE Currency.
POE Currency in Gems
Gems gain experience and levels alongside the character wearing them in hunting for POE Currency. For all the experience the exile receives, a gem gains its own additional experience at 10% of that amount. Additional gems do not share that experience, but gain their own 10%. Gem experience is not restricted by player level boundaries, so high level characters might not gain experience from low level enemies, but the gem will continue to gain the 10% it normally would.
Once a gem has enough experience to level up, it will stop gaining experience and a level–up icon will appear on the right of the screen and in the inventory menu. Left–clicking it will level up the gem, right–clicking the icon will hide it on the side of the screen, but it will still be accessible in the inventory menu. Not leveling up a gem is useful in some situations.
Path of Exile Currency Profiting on Gems
As gems level up, the abilities they grant get better, but the requirements to equip them also increase, as well as the mana cost for active skills. Each gem level, the exile must have both the attribute corresponding to gem color and a character level high enough to meet its increased requirements for hunting Path of Exile Currency. If a gem gains enough experience to level up, but the exile currently does not meet the requirements, the level–up icon will appear grayed out and not be useable until the requirements are met. For specifics, see the lists of active skills and support gems below.
Gems may be traded like normal items and they will retain their experience.