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
Red/Yellow/Blue 1 star Nightmare Tear
+10 All Stats
Epic
Yellow/Blue 1 star Zen Elven Peridot
+25 Spirit and +25 Mastery
Epic