Updated For 6.0.2 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 3 star Nightmare Tear
+0 All Stats
Epic
Red/Blue 2 star Glinting Tanzanite
+5 Agility and +4 Hit
Epic
Blue 2 star Rigid Majestic Zircon
+40 Hit
Epic
Red/Yellow/Blue 2 star Void Sphere
+4 Resist All
Epic
Blue 1 star Solid Serpent's Eye
+480 Stamina
Epic
Red/Blue 1 star Purified Tanzanite
+5 Intellect and +8 Spirit
Epic
Blue 1 star Sparkling Serpent's Eye
+480 Spirit
Epic
Yellow/Blue 1 star Lightning Chrysoprase
+10 Hit and +8 Haste
Epic