Updated For 6.0.2 Warlords of Draenor

Gem Quality

Color Popularity Gem Quality
Red/Yellow/Blue 6 star Nightmare Tear
+0 All Stats
Epic
Yellow 4 star Smooth Serpent's Eye
+480 Critical Strike
Epic
Red/Yellow/Blue 3 star Void Sphere
+4 Resist All
Epic
Yellow 2 star Fractured Serpent's Eye
+480 Mastery
Epic