The Gem of Struggle is an essence gem which grants a small bonus to all three ability scores (Body, Mind, and Spirit). It is exclusive to followers of the Way of the Closed Fist, and there is no equivalent for followers of the Way of the Open Palm. It is part of a series of gems with similar effects, being slightly stronger than the Gem of Purpose but slightly weaker than the Gem of Mastery.

It can be purchased from two different sources:

In-game description: "Every worthwhile goal requires hardship and struggle. A victory gained with ease means nothing. The struggle defines the worth of a goal. A true step on the path to power demands it. Only one who would seize and command his fate knows what true struggle is. The lives of those lost along this path to power aid those who would follow in their footsteps."