Gem Stacks.

[Blinkybubs]

Is there a mod that increases gem stacks beyond 5? I was brouseing the workshop and nothing stuck out.

[Sir Francis]

Then probably not, because it is very rare to matter anyway. Why would anyone make a mod for smth so minor?

[PalmTree]

There's no mods for gem stacking specifically, only ones that increase stack sizes for all items.

[Skinny Pete]

The Geological Study Hall district from CoM increases gem stacking by 1. This isn't much but it includes Puzzling Trapezohedron which is good enough to make the district worth getting, at least after you get all the CoM trinkets you want.

[T9]

Like ruby, sapphire and the like?

go to your Darkest Dungeon files, look for inventory folder and this file "base.gem.inventory.items.darkest", open with notepad

adjust the stack size to your liking