Updated For 6.0.2 Warlords of Draenor

Gem Quality

Color Popularity Gem Quality
Red/Yellow 6 star Crafty Vermilion Onyx
+160 Expertise and +160 Critical Strike
Rare
Red 1 star Delicate Primordial Ruby
+160 Agility
Rare
Red 1 star Precise Primordial Ruby
+320 Expertise
Rare
Red/Yellow 1 star Polished Vermilion Onyx
+80 Agility and +160 Dodge
Rare
Red/Blue 1 star Glinting Imperial Amethyst
+80 Agility and +160 Hit
Rare
Red/Yellow 1 star Deadly Vermilion Onyx
+80 Agility and +160 Critical Strike
Rare
Red/Yellow 1 star Resolute Vermilion Onyx
+160 Expertise and +160 Dodge
Rare