TavernLich

I mean how are they used? Like would using the plugin count as a magic for your character?

No

Back before Kalameet used to be an LM and MAT leader, the explanation he once said for it was that; gems, containing minute quanitiies of mana, when arranged in a certain formation (glyph, if you will) form an 'enchantment'. Though it wouldn't be nearly the same as rp enchanting.