None. Opals are universal and cannot be crafted, they are only dropped. Resist Jewels are pretty useless anyways. They are flat rate, not %. So if you had a 50 resist jewel, get hit by a 1000 damage bolt, it'll do 950, if it crits it'll do 1950 instead of 2000.
Hi, Actually the pet jewels can give a lot of school specific resist. I have not seen a Spell-Proof or Defy yet but have Storm-Proof, Death-Proof, etc and all the "Away" talents in Pet Jewels. On the Damage Side there are Giver jewels and "Boon". I have not seen Dealer yet.
None. Opals are universal and cannot be crafted, they are only dropped. Resist Jewels are pretty useless anyways. They are flat rate, not %. So if you had a 50 resist jewel, get hit by a 1000 damage bolt, it'll do 950, if it crits it'll do 1950 instead of 2000.
You sir just saved me from using the what I thought was uber 50 resist jewel. Thanks for the good explanation.