Gem

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Introduction

Functionless on their own, gems possess great power when utilized with a weapon, shield, or helm, bestowing potent magical enchantments upon the item and its wearer. Socketed armor is added in the Expansion, but all items have identical stats in either armor or helms. Gems, once socketed, add special bonuses to the items. Check the stats pages for specifics.

There are seven different types of gems:

Amethysts
Diamonds
Emeralds
Rubies
Sapphires
Skull Gems
Topazes

All have different effects depending on what sort of item they are "socketed" in. There are five levels of quality for gems: from worst to best they are

chipped
flawed
normal
flawless
perfect

Gems can not be bought, only found, though this changed several times during development. Better quality gems are found as you progress in the game.

  • In Diablo II the system is rigid: Chipped gems in Acts 1 and 2 and Flawed in Acts 3 and 4, with very rare exceptions of monsters (High Council usually) dropping Normals. In Nightmare and Hell all gems dropped are normal.
  • In the Expansion there is more variety. Gem quality dropped is based on Mlvl, and though it progresses at about the same rate, you can find some Normal gems in Acts 4 and 5, with occasional Flawless. Nightmare and Hell are the same, Normal and some Flawless.

Socketed Items

Only weapons, helms, and shields can have sockets, with body armor added to the list in the Expansion. No boots, gloves, belts, or jewelry will ever be socketed, not even Uniques.

  • The number of sockets is fixed in Diablo II, all helms have 2, and all shields and weapons have 3, unless the item is only 2 spaces tall in inventory (bucklers, daggers) in which case it has but two sockets.
  • In the Expansion items vary a lot more in sockets. Helms can have from 1-4, Body armor 1-4, weapons 1-6, and shields 1-4. Full details elsewhere in our Items section.

Once a gem is inserted into a socket, it is there forever, and can't be upgraded in quality, so be sure you want to put a gem in before you do.

In Diablo II only normal items are socketed, and you can find or buy them.

In the Expansion you can only buy magical equipment, so can never buy anything socketed from the NPCs (unless someone else in your game sells a socketed item, and you then buy it from the NPC). Sockets can be found on normal or superior items, and can be made in magical, rare, unique, and set items, either with Horadric Cube recipes, or as an Act Five quest reward. The maximum number of sockets is never more than the spaces an item takes up in inventory, and you can only get 1 socket in Rares, and only one or sometimes two in Sets and Uniques. Two or sometimes three in magical items.

Upgrading Gems

Three gems of the same type combine in the Horadric Cube to upgrade one level of quality.

Gem shrines are found only rarely, but they are worth a click, as they'll upgrade one gem from your inventory one level. It's best to carry around a flawless gem of whatever type you want upgraded and be sure it's the only gem in your inventory when you click the shrine. If you don't have any gems, or only have perfect gems, one random chipped gem will be dropped.

Gem Effects

So what do gems do? Their effects vary, but are logical: Gems placed into weapons generally add damage, while gems in shields provide resistance, and gems in helms/armor add to hit points or other attributes. Exactly how much benefit a socketed gem provides depends on the quality of the gem.

Gemmed-hat.jpg
You can see how gems look in an item here in this shot. The sockets display down the left side of the image for all socketed items, and if they are filled the gem is visible there, rather than an empty hole. Socketed gems in an item glow nicely, as you can see from the sapphires in this helm, and the info detailing their effects is displayed in blue, below the normal stats for the item. Socketed items in the game appear brightly-colored, and their appearance is based on the first gem socketed. An item with an Amethyst first, then two Emeralds will be purple, not green. When you socket an item it just drops in and the item changes color; there isn't any flashy light show.

The bonuses from gems of the same type stack, so if you had two rubies in a sword, the fire damage would be added together. It is arithmetic, never geometric, so if you had say three sapphires, all of them chilling for 3 seconds, you wouldn't move up to freezing the monster, you'd just chill it for longer. The same goes for other gems. For example rubies add fire damage to your attack. Three perfect rubies would do a lot of fire damage, but they wouldn't create a small firewall under the monster.

Gems in shields do nothing for the Paladin's Smite attack.

Gem Stats (Expansion)

Amethysts

Quality Weapon Helm or Armor Shield Clvl Req
Chipped Amethyst-chipped.gif +40 to Attack Rating +3 to Strength +8 to Defense 1
Flawed Amethyst-flawed.gif +60 to Attack Rating +4 to Strength +12 to Defense 5
Normal Amethyst-normal.gif +80 to Attack Rating +6 to Strength +18 to Defense 12
Flawless Amethyst-flawless.gif +100 to Attack Rating +8 to Strength +24 to Defense 15
Perfect Amethyst-perfect.gif +150 to Attack Rating +10 to Strength +30 to Defense 18

Diamonds

Quality Weapon Helm or Armor Shield Clvl Req
Chipped Diamond-chipped.gif +28% damage vs. the undead +20 to Attack Rating +6% Resistance to All 1
Flawed Diamond-flawed.gif +34% damage vs. the undead +40 to Attack Rating +8% Resistance to All 5
Normal Diamond-normal.gif +44% damage vs. the undead +60 to Attack Rating +11% Resistance to All 12
Flawless Diamond-flawless.gif +54% damage vs. the undead +80 to Attack Rating +14% Resistance to All 15
Perfect Diamond-perfect.gif +68% damage vs. the undead +100 to Attack Rating +19% Resistance to All 18


Emeralds

Emeralds stack oddly, adding much more damage than you would expect. Multiple of the same type, the duration adds, the damage is squared. 2 = 4x damage over 2 seconds, 3 = 9x damage over 3 seconds, etc. Adding other types of poison damage (from jewels in armor/helm/shield, poison charms, unique armor, etc) in creates enormous damage.

Six perfect emeralds in a weapon yields (29.3 x 36) 1054.8 poison damage over six seconds. Big socketed emeralds with other poison damage is the best way to deal with most Physical Immune monsters.


Quality Weapon Helm or Armor Shield Clvl Req
Chipped Emerald-chipped.gif Adds 5 (5.9) poison damage in 1 sec +3 to Dexterity +12% Poison Resistance 1
Flawed Emerald-flawed.gif Adds 11 (11.7) poison damage in 1 sec +4 to Dexterity +16% Poison Resistance 5
Normal Emerald-normal.gif Adds 17 (17.6) poison damage in 1 sec +6 to Dexterity +22% Poison Resistance 12
Flawless Emerald-flawless.gif Adds 23 (23.4) poison damage in 1 sec +8 to Dexterity +28% Poison Resistance 15
Perfect Emerald-perfect.gif Adds 29 (29.3) poison damage in 1 sec +10 to Dexterity +40% Poison Resistance 18


Rubies

Quality Weapon Helm or Armor Shield Clvl Req
Chipped Ruby-chipped.gif +3-4 Fire Damage +10 to Maximum Life +12% fire resistance 1
Flawed Ruby-flawed.gif +5-8 to Fire Damage +17 to Maximum Life +16% to Fire Resistance 5
Normal Ruby-normal.gif +8-12 to Fire Damage +24 to Maximum Life +22% fire resistance 12
Flawless Ruby-flawless.gif +10-16 to Fire Damage +31 to Maximum Life +28% fire resistance 15
Perfect Ruby-perfect.gif +15-20 Fire Damage +38 to Maximum Life +40% fire resistance 18


Sapphires

Cold time stacks from all equipment and skills, and is cut by 1/2 on Nightmare and 1/4 on Hell.


Quality Weapon Helm or Armor Shield Clvl Req
Chipped Sapphire-chipped.gif +1-3 Cold Damage
1 second Cold Time
+10 to Maximum Mana +12% to Cold Resistance 1
Flawed Sapphire-flawed.gif +3-5 Cold Damage
1.4 second Cold Time
+17 to Maximum Mana +16% to Cold Resistance 5
Normal Sapphire-normal.gif +4-7 Cold Damage
2 second Cold Time
+24 to Maximum Mana +22% to Cold Resistance 12
Flawless Sapphire-flawless.gif +6-10 Cold Damage
2.4 second Cold Time
+31 to Maximum Mana +28% to Cold Resistance 15
Perfect Sapphire-perfect.gif +10-14 Cold Damage
3 second Cold Time
+38 to Maximum Mana +40% to Cold Resistance 18


Topazes

Quality Weapon Helm or Armor Shield Clvl Req
Chipped Topaz-chipped.gif +1-8 Lightning Damage +9% chance to find magical items +12% Lightning Resistance 1
Flawed Topaz-flawed.gif +1-14 Lightning Damage +13% chance to find magical items +16% Lightning Resistance 5
Normal Topaz-normal.gif +1-22 Lightning Damage +16% chance to find magical items +22% Lightning Resistance 12
Flawless Topaz-flawless.gif +1-30 Lightning Damage +20% chance to find magical items +28% Lightning Resistance 15
Perfect Topaz-perfect.gif +1-40 Lightning Damage +24% chance to find magical items +40% Lightning Resistance 18


Skulls

Quality Weapon Helm or Armor Shield Clvl Req
Chipped Skull-chipped.gif Steals 2% life and 1% mana per hit Replenish life +2 and mana regen. 8% Attacker takes damage of 4 1
Flawed skull-flawed.gif (1424 bytes) Steals 2% life and 2% mana per hit Replenish life +3 and mana regen. 8% Attacker takes damage of 8 5
Normal Skull-normal.gif Steals 3% life and 2% mana per hit Replenish life +3 and mana regen. 12% Attacker takes damage of 12 12
Flawless Skull-flawless.gif Steals 3% life and 3% mana per hit Replenish life +4 and mana regen. 12% Attacker takes damage of 16 15
Perfect Skull-perfect.gif Steals 4% life and 3% mana per hit Replenish life +5 and mana regen 19% Attacker takes damage of 20 18


Gem Stats (Classic)