The green set affixes can be found if you go to codex, dictionary, then on the second page you’ll see ‘sets’, click that and you can have a read there…
An initial explanation to Sets by Golem himself 
A large, in-depth guide by Skaul if you decide you want the legendex in here, let me know, i have an updated version 
Crystal crafting restrictions since you were asking about sets, the amythest crystal can apply sets, but there’s a few that cannot be rolled, and some that are class specific (can only be applied by using jasper to change item class, then again to change them back)