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Gems can b e socketed into armor, weapons or jewelry. Blizzard has kept the naming conventions from the previous games so the gem types will be familiar to players.

The different types of gems affect gear in the three categories of Weapons, Armor and Jewelry where a Gem can be applied.

Gem Tiers

There are 5 tiers of gems:

  • Crude
  • Chipped
  • (normal)
  • Flawless
  • Royal

Gem Types

There are 7 types of gems:

  • Amethyst
  • Diamond
  • Emerald
  • Ruby
  • Sapphire
  • Skull
  • Topaz

Gem Effects

Type Weapons Armor Jewelry
Skull Life per Kill + Healing + Armor
Emerald +% Damage to Elites +Thorns Poison resist
Diamond +% ult dmg + Barrier strength All resists
Ruby +% Resource regen +% Life Fire resist
Saphire +% Crit dmg to cc(stun) enemies +% dmg reduction while Fortified Cold resist
Topaz +% Lucky hit +% dmg reduction while cc'd Lightning Resist
Amethyst +% Bleed damage +% DOT reduction Shadow Resist