Updated For 6.0.2 Warlords of Draenor

Gem Quality

Color Popularity Gem Quality
Blue 6 star Sparkling Serpent's Eye
+480 Spirit
Epic
Red/Blue 1 star Mysterious Serpent's Eye
+160 Intellect and +160 PvP Power
Epic
Red/Yellow/Blue 1 star Nightmare Tear
+0 All Stats
Epic
Red/Yellow/Blue 1 star Void Sphere
+4 Resist All
Epic