Updated For 5.4 Mists of Pandaria

Gem Quality

Color Popularity Gem Quality Auction Price
Yellow/Blue 6 star Lightning Chrysoprase
+5 Hit and +4 Haste
Epic
Red/Yellow 6 star Resplendent Fire Opal
+5 Strength and +4 PvP Resilience
Epic
Yellow 6 star Smooth Serpent's Eye
+480 Critical Strike
Epic
Yellow/Blue 6 star Regal Chrysoprase
+5 Dodge and +6 Stamina
Epic
Yellow 6 star Fractured Serpent's Eye
+480 Mastery
Epic