Updated For 5.4 Mists of Pandaria

Gem Quality

Color Popularity Gem Quality Auction Price
Blue 6 star Solid Serpent's Eye
+480 Stamina
Epic
Yellow/Blue 6 star Jagged Elven Peridot
+25 Critical Strike and +37 Stamina
Epic
Red/Yellow/Blue 6 star Nightmare Tear
+10 All Stats
Epic