Talk:Gems/@comment-11967298-20140106082220/@comment-5249784-20140106103634

you don't need unlocking them. if the initial slot is empty, you can put the sack in and you will get 3 empty slots more!

you can only put one gem of a kind in each slot, that means one gem to increase profit, one to increase xp, one to lower the repair costs, fore example.

in other words, you can't set 2 saphires in, or 3 rubins ,etc.