Well, is there anything special about the different gems? Otherwise, it'd just be a repeat of almost every modders first or second mod. Like for example, the Turquoise(Aquamarine?) could let you breathe underwater, etc.
well I am ok with you creating the mod you can name whatever and i dont care if its in 1.6.4 or 1.7.2 but if you do make it give just a little credit to me and i am trying to get my parents to let me get PC and i am thinking of the ability's it could have