Updated For 5.4 Mists of Pandaria

Gem Quality

Color Popularity Gem Quality Auction Price
Red/Yellow/Blue 6 star Nightmare Tear
+10 All Stats
Epic
Red/Yellow/Blue 2 star Void Sphere
+4 Resist All
Epic
Yellow/Blue 2 star Puissant Elven Peridot
+25 Mastery and +37 Stamina
Epic