Updated For 6.0.3 Warlords of Draenor

Gem Quality

Color Popularity Gem Quality
Red/Blue 6 star Assassin's Serpent's Eye
+160 Agility and +160 PvP Power
Epic
Red/Yellow/Blue 4 star Void Sphere
+4 Resist All
Epic
Red/Yellow/Blue 4 star Nightmare Tear
+0 All Stats
Epic
Red/Blue 2 star Glinting Tanzanite
+5 Agility and +4 Hit
Epic
Yellow/Blue 2 star Jagged Seaspray Emerald
+10 Critical Strike and +7 Stamina
Epic
Blue 2 star Solid Serpent's Eye
+480 Stamina
Epic
Red/Blue 2 star Shifting Shadowsong Amethyst
+5 Agility and +7 Stamina
Epic
Red/Blue 1 star Timeless Tanzanite
+5 Intellect and +6 Stamina
Epic
Red/Blue 1 star Shifting Tanzanite
+5 Agility and +6 Stamina
Epic
Blue 1 star Rigid Serpent's Eye
+480 Hit
Epic