Updated For 5.4 Mists of Pandaria

Gem Quality

Color Popularity Gem Quality Auction Price
Yellow/Blue 6 star Steady Chrysoprase
+6 Stamina and +5 PvP Resilience
Epic
Yellow/Blue 6 star Jagged Chrysoprase
+5 Critical Strike and +6 Stamina
Epic
Red/Yellow/Blue 6 star Nightmare Tear
+10 All Stats
Epic