As a retribution paladin, your gem choice is going to be quite limited. Really, you should only be gemming for 2 stats.
- Hit Rating
- Strength
That said, most gear now has plenty of hit rating on it, so hitting the cap is quite easy. That basically leaves you to gem strength, strength, and more strength. This is by far our most important stat to stack, further increasing our dps than any other stat. Here are your gem options:
Meta
[Relentless Earthsiege Diamond] +21 Agility / +3% Increased Critical Strike damage
[Chaotic Skyflare Diamond] +21 Critical Strike / +3% Increased Critical Strike damage
* The note for the meta gems is that the relentless gem offers more dps due to the fact that it only requires one blue gem. While the chaotic by stats alone is a smidge better, requiring 2 blue gems to activate actually makes it lower dps.
Red
[Bold Cardinal Ruby] +20 strength
[Bold Stormjewel] +20 strength
[Bold Scarlet Ruby] +16 strength
Orange
[Inscribed Flawless Ametrine] +10 Strength / +10 Critical Strike
[Inscribed Monarch Topaz] +8 Strength / +8 Critical Strike
Yellow
[Rigid King’s Amber] +20 Hit Rating
[Rigid Stormjewel] +20 Hit Rating
[Rigid Autumn’s Glow] +16 Hit Rating
Purple
[Sovereign Dreadstone] +10 Strength / +10 Stamina
[Sovereign Twilight Opal] +8 Strength / +8 Stamina