Guild Wars 2

Hello.

I recently found that i can afford some ascended jewelery. I enjoy doing fractals so i think i need some agony resistance for further levels.
I bought ring from pristine fractals and amulet from laurels. It has Unused Offensive Infusion Slot. I want to get some agony resistance in it, but i dont really know how to do it. I saw some rings with (infused) in title, whitch has offensive slot + infusion slot.
Do i have to craft it somehow?

Thanks in advance

There are two kinds of infusions BASICALLY…a variety of “standard” infusions and those you can craft yourself as an Artificer (crafting lvl 100).
The standard are the ones you put in “normal” ascended gear. The self-mades, you need to have (infused) gear.
Selfmade infusions can go up to A LOT AR..but you need to be richer then Bill gates atm hahaha
I wil give you two links which explains more
http://gw2agony.david-reess.de/
http://wiki.guildwars2.com/wiki/Infusion

So i can put Versatile Simple Infusion in my offensive infusion slot or i can craft via mystic forge my ring into Infused ring with:

1 Shard of Crystallized Mists Essence.png Shard of Crystallized Mists Essence
3 Glob of Coagulated Mists Essence.png Globs of Coagulated Mists Essence
5 Vial of Condensed Mists Essence.png Vials of Condensed Mists Essence.

and i could use agony infusion whitch gives more than 5 AR?