Updated For 6.0.3 Warlords of Draenor

Gem Quality

Color Popularity Gem Quality
Blue 6 star Sparkling Serpent's Eye
+480 Spirit
Epic
Red/Blue 2 star Mysterious Serpent's Eye
+160 Intellect and +160 PvP Power
Epic
Blue 2 star Solid Serpent's Eye
+480 Stamina
Epic