Each gem can be embedded onto a piece of equipment, adding its features thereby. Only one gem can be embedded into a piece of equipment at once Once a gem is embedded into a piece of equipment, its effect will have a chance of taking place. Gems can also be upgraded in the smithy, where one gem is inserted in the middle and six gems of the same or higher level are added on the outside. If successful, a gem with the same effect with 1 level higher is produced.
Gems are acquired most commonly by looting robber baron castles, using your alliance smithy, completing nobility contests, and the Everwinter Glacier Native Village in exchange for charcoal. Gems are also occasionally provided in special offers. Gems are typically acquired as a "level x gem" with x representing the level of the gem.