Diablo II: Lord of Destruction
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Item Basics | Normal Items | Exceptional Items | Elite Items | Socketed Items | Gems | Jewels | Runes | Rune Words | Magic Items | Magic Prefixes and Suffixes | Crafted Items | Set Items | Unique Items | Charms | The Horadric Cube | Items Index

Gems

Precious gems embody innate magical abilities. When set into a socketed item these gems can add powerful magic effects. Higher grades of gems have stronger effects. There are five grades of gems: chipped, flawed, standard, flawless, and perfect. Once inserted, gems cannot be removed from a socket. Touching a gem shrine either produces a gem or upgrades one gem (randomly chosen from your character's inventory) to the next higher grade. The skulls of some demonic creatures, inscribed with eldritch symbols, are said to work much like gems.

Upgrading Gems
You can upgrade gems by using a Gem Shrine or by using the Horadric Cube. You can use the Horadric Cube to convert gems into higher quality gems. Place 3 Gems of one type into the Horadric Cube and hit the Transmute button.

Vendors do not normally sell Gems
If another player in a multiplayer game sells a Gem to a Vendor you may be able to buy it.

Vendors also will not typically pay you full price for socketed items.

Gem effects Stackable
If you place 3 Gems of the same type in a sword you will receive the bonus of all three.

The first Gem that is placed will determine the color of the weapon. If there are several different types of Gems in a sword, it will randomly display an attack based on those types of Gems in the sword. So one swing will show cold damage, while the next shows poison attack but all of them are working at the same time.

Note: For Emeralds, when calculating the final damage after the gems have been added, the damage (but not the length) is added up.

The real damage of poison internally is held as damage per frame and duration in frames, in many cases (including gems, skills, items and so on), the true poison damage is actually a non integer number and the shown value is truncated, meaning you can, if the fractions add up, see some "bonus" effects which is in fact not a bonus, just fractions adding up and being shown when the game truncates the poison damage.

Once the final damage has been calculated by adding the Emeralds, it does X damage total, over its Y duration.

Sapphires
The Freeze Durations are cumulative.

Skulls

Weapons: Adds Mana and Life Steal to attack
Shields: Adds attacker takes damage
Helms and Armor: Adds Mana and Life regeneration

  Gem Req Level Weapons Shields Helms and Armor
Chipped Skull
1 Steals 2% life, 1% Mana Attacker Takes Damage of 4 Replenish Life +2, Regenerate Mana 8%
Flawed Skull
5 Steals 2% life, 2% Mana Attacker Takes Damage of 8 Replenish Life +3, Regenerate Mana 8%
Skull
12 Steals 3% life, 2% Mana Attacker Takes Damage of 12 Replenish Life +3, Regenerate Mana 12%
Flawless Skull
15 Steals 3% life, 3% Mana Attacker Takes Damage of 16 Replenish Life +4, Regenerate Mana 12%
Perfect Skull
18 Steals 4% life, 3% Mana Attacker Takes Damage of 20 Replenish Life +5, Regenerate Mana 19%


Amethyst

Weapons: Adds to Attack Rating
Shields: Adds to Defense
Helms and Armor: Adds to Strength

  Gem Req Level Weapons Shields Helms and Armor
Chipped Amethyst
1 +40 to Attack Rating +8 Defense +3 to Strength
Flawed Amethyst
5 +60 to Attack Rating +12 Defense +4 to Strength
Amethyst
12 +80 to Attack Rating +18 Defense +6 to Strength
Flawless Amethyst
15 +100 to Attack Rating +24 Defense +8 to Strength
Perfect Amethyst
18 +150 to Attack Rating +30 Defense +10 to Strength


Sapphire

Weapons: Adds Cold Damage
Shields: Adds Resistance to Cold
Helms and Armor: Adds Maximum Mana

  Gem Req Level Weapons Shields Helms and Armor
Chipped Sapphire
1 1-3 Cold Damage - 1.0 sec Duration 12% Resist Cold +10 Max Mana
Flawed Sapphire
5 3-5 Cold Damage - 1.4 sec Duration 16% Resist Cold +17 Max Mana
Sapphire
12 4-7 Cold Damage - 2.0 sec Duration 22% Resist Cold +24 Max Mana
Flawless Sapphire
15 6-10 Cold Damage - 2.4 sec Duration 28% Resist Cold +31 Max Mana
Perfect Sapphire
18 10-14 Cold Damage - 3.0 sec Duration 40% Resist Cold +38 Max Mana


Emerald

Weapons: Adds Poison Damage
Shields: Adds to Resistance to Poison
Helms and Armor: Adds to Dexterity

  Gem Req Level Weapons Shields Helms and Armor
Chipped Emerald
1 +10 Poison Damage over 3 Seconds 12% Resist Poison +3 to Dexterity
Flawed Emerald
5 +20 Poison Damage over 4 Seconds 16% Resist Poison +4 to Dexterity
Emerald
12 +40 Poison Damage over 5 Seconds 22% Resist Poison +6 to Dexterity
Flawless Emerald
15 +60 Poison Damage over 6 Seconds 28% Resist Poison +8 to Dexterity
Perfect Emerald
18 +100 Poison Damage over 7 Seconds 40% Resist Poison +10 to Dexterity


Ruby

Weapons: Adds Fire Damage
Shields: Adds Resistance to Fire
Helms and Armor: Adds to Maximum Life

  Gem Req Level Weapons Shields Helms and Armor
Chipped Ruby
1 3-4 Fire Damage 12% Resist Fire +10 to Life
Flawed Ruby
5 5-8 Fire Damage 16% Resist Fire +17 to Life
Ruby
12 8-12 Fire Damage 22% Resist Fire +24 to Life
Flawless Ruby
15 10-16 Fire Damage 28% Resist Fire +31 to Life
Perfect Ruby
18 15-20 Fire Damage 40% Resist Fire +38 to Life


Diamond

Weapons: Adds to Damage vs. Undead
Shields: Adds to all Resistances
Helms and Armor: Adds to Attack Rating

  Gem Req Level Weapons Shields Helms and Armor
Chipped Diamond
1 +28% Damage vs. Undead All Resistances +6% +20 to attack Rating
Flawed Diamond
5 +34% Damage vs. Undead All Resistances +8% +40 to attack Rating
Diamond
12 +44% Damage vs. Undead All Resistances +11% +60 to attack Rating
Flawless Diamond
15 +54% Damage vs. Undead All Resistances +14% +80 to attack Rating
Perfect Diamond
18 +68% Damage vs. Undead All Resistances +19% +100 to attack Rating


Topaz

Weapons: Adds Lightning Damage
Shields: Adds to Resistance to Lightning
Helms and Armor: Adds Chance to find Magic Items

  Gem Req Level Weapons Shields Helms and Armor
Chipped Topaz
1 1-8 Lightning Damage 12% Resist Lightning +9% Chance to Find Magic Items
Flawed Topaz
5 1-14 Lightning Damage 16% Resist Lightning +13% Chance to Find Magic Items
Topaz
12 1-22 Lightning Damage 22% Resist Lightning +16% Chance to Find Magic Items
Flawless Topaz
15 1-30 Lightning Damage 28% Resist Lightning +20% Chance to Find Magic Items
Perfect Topaz
18 1-40 Lightning Damage 40% Resist Lightning +24% Chance to Find Magic Items



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