Updated For 6.0.3 Warlords of Draenor

Gem Quality

Color Popularity Gem Quality
Red/Blue 6 star Glinting Imperial Amethyst
+80 Agility and +160 Hit
Rare
Red/Blue 3 star Assassin's Imperial Amethyst
+80 Agility and +80 PvP Power
Rare
Red/Blue 1 star Perfect Assassin's Roguestone
+80 Agility and +80 PvP Power
Rare
Red/Blue 1 star Accurate Imperial Amethyst
+160 Expertise and +160 Hit
Rare
Red/Blue 1 star Glinting Roguestone
+60 Agility and +120 Hit
Uncommon
Red/Blue 1 star Shifting Roguestone
+60 Agility and +90 Stamina
Uncommon