Gemstones, Jewelry, and League of Legends.

So like.... I've been a League player for a good few years, and have also had a vast interest in gemstones and jewelry for several years beyond that. I am just starting to open up into pursuing gold and silversmithing as well the fabrication and repairs of pretty much any sort of jewelry or piece of physical art. What I am looking to find out... 1. Are there any copyright restrictions if I were to fabricate a few LoL related pieces to sell off? 2. Where and who should I ask for such regarding permission or potential collaborations?

Just made my little business public several months back, and after a rough few weeks, figured I should take the risk to come to you guys and see how much interest might pop up. I'll give a link to my wares and information once a Riot staffer gives me the ok to, as I do not want to advertise like a shameless whore without permission.