Updated For 6.0.3 Warlords of Draenor

Gem Quality

Color Popularity Gem Quality
Red/Yellow 6 star Artful Vermilion Onyx
+80 Intellect and +160 Mastery
Rare
Red/Yellow 2 star Keen Vermilion Onyx
+160 Expertise and +160 Mastery
Rare
Red/Yellow 1 star Potent Vermilion Onyx
+80 Intellect and +160 Critical Strike
Rare
Red/Yellow 1 star Reckless Vermilion Onyx
+80 Intellect and +160 Haste
Rare
Red/Yellow 1 star Willful Vermilion Onyx
+80 Intellect and +80 PvP Resilience
Rare
Red/Yellow 1 star Potent Tiger Opal
+60 Intellect and +120 Critical Strike
Uncommon
Red/Yellow/Blue 1 star Nightmare Tear
+0 All Stats
Epic
Red/Yellow 1 star Stalwart Fire Opal
+5 Parry and +4 Dodge
Epic
Red/Yellow 1 star Deadly Ember Topaz
+20 Agility and +40 Critical Strike
Rare
Red/Yellow/Blue 1 star Enchanted Tear
+6 All Stats
Rare
Red/Yellow/Blue 1 star Enchanted Pearl
+4 All Stats
Uncommon