Updated For 6.0.2 Warlords of Draenor

Gem Quality

Color Popularity Gem Quality
Red/Blue 6 star Assassin's Imperial Amethyst
+80 Agility and +80 PvP Power
Rare
Red/Blue 4 star Glinting Imperial Amethyst
+80 Agility and +160 Hit
Rare
Red/Blue 4 star Shifting Imperial Amethyst
+80 Agility and +120 Stamina
Rare
Blue 2 star Stormy River's Heart
+160 PvP Power
Rare
Red/Blue 2 star Accurate Imperial Amethyst
+160 Expertise and +160 Hit
Rare
Blue 2 star Rigid River's Heart
+320 Hit
Rare
Red/Blue 2 star Perfect Glinting Roguestone
+80 Agility and +160 Hit
Rare
Blue 1 star Stormy Lapis Lazuli
+120 PvP Power
Uncommon
Blue 1 star Solid River's Heart
+240 Stamina
Rare