Devs Gems From Hell  

IF YOU FIND THIS MOD OVERPOWERED PLEASE DON"T DOWNLOAD IT NOR COMPLAIN AS NO ONE IS FORCING YOU TO DOWLOAD AND INSTALL IT

This Mod Adds In Gems, These gems can be crafted through a skill tree And Also lower rank Gem and Special Gems Can be found In Zombie Loot depending on colour like Yellow,Blue,Red bags.

Going through the skill tree you can make gems but you will need to mine the ores first Though so gems not many can be upgraded without the skills tree and cost you dukes.

And It Wont be Easy so good luck.

You will Also get if you start a new Game The Pick Your Class Quest And Skill Gem.

During Testing it Worked With 

War3zuk Overhaul mod - But this was a new world, And single player.