Path of the gemstone

 The barbarian witch as made only one with gemmestones can now use their property as he wishes.

Hardening

Your fusion with gemstone allows you to harden your body to the extreme. You can now, as a bonus action, harden your body to look like a gemstone during 1 minute. When you do so, you gain +2 to AC, resitance to piercing and slashing damage and your movement speed becomes 0. You can use this feature a number of times equals to your proficiency modifier per long rest, if used more, you gain one level of exhaustion.

Partial hardening

Beginning at 6th level, you can now control your transformation into gemstone. If you are transformed into gemstone and another creature you can see within 30 feet of you takes damage, you can use your reaction to take the damage and that damage is reduced by 2d6. This feature uses one of your Hardening charge and cancel the effects of hardening.

When you reach certain levels in this class, you can reduce the damage by more: by 3d6 at 10th level and by 4d6 at 14th level.

Gem cage

At 10th level, you become more and more used to your new condition and can control gems outside your body. You can now, as an action, trap a creature you can see in gems. The target must succed on a Strength saving throw DC {11 + (your constitution modifier)} or become  restrained. The target can repeat this saving throw every turn to escape the gem cage. You must expend a hardening charge to use this feature.

Magic absorb

Starting at 14th level, your gems unleash their magic potential. You can now, as a reaction, absorb magic damages from an enemy attack, witch reduce the damages by half and return the other half against the attacker. Using this feature expends a hardening charge