Updated For 6.0.2 Warlords of Draenor

Gem Quality

Color Popularity Gem Quality
Red/Blue 6 star Purified Imperial Amethyst
+80 Intellect and +160 Spirit
Rare
Yellow/Blue 3 star Jagged Jasper
+30 Critical Strike and +23 Stamina
Uncommon
Red/Blue 2 star Perfect Purified Roguestone
+80 Intellect and +160 Spirit
Rare
Blue 2 star Perfect Sparkling Lapis Lazuli
+320 Spirit
Rare
Yellow/Blue 1 star Forceful Wild Jade
+160 Haste and +120 Stamina
Rare
Red/Blue 1 star Timeless Nightstone
+15 Intellect and +23 Stamina
Uncommon
Blue 1 star Sparkling Serpent's Eye
+480 Spirit
Epic