Updated For 5.4 Mists of Pandaria

Gem Quality

Color Popularity Gem Quality Auction Price
Blue 6 star Sparkling Serpent's Eye
+480 Spirit
Epic
Yellow/Blue 2 star Vivid Elven Peridot
+25 PvP Power and +25 PvP Resilience
Epic
Red/Yellow/Blue 2 star Void Sphere
+4 Resist All
Epic