Gems are equipment-enhancing items that only take up one slot of inventory space. You place them within socketed equipment; once placed, they can never be removed. There are seven types of gem (amethyst, diamond, emerald, ruby, sapphire, skull, topaz) and each is available in five different qualities (chipped, flawed, normal, flawless, perfect). Each gives a bonus to the equipment it is placed in, which depends on the type of that equipment; socketed equipment also takes on a color based on the first gem placed in it. Like most items, each gem type has a character level requirement to be used, which ranges from 1 (chipped) up to 18 (perfect). Gem effects are fully stackable (including freeze length) when multiple gems/jewels are socketed in the same item. Using the Horadric Cube, three gems of one quality can be combined to create one gem of the next highest quality.
|Gem||Level||Weapon bonus||Shield bonus||Helm/Armor bonus|
|Chipped Amethyst||1||+40 to Attack Rating||+8 to Defense||+3 to Strength|
|Flawed Amethyst||5||+60 to Attack Rating||+12 to Defense||+4 to Strength|
|Amethyst||12||+80 to Attack Rating||+18 to Defense||+6 to Strength|
|Flawless Amethyst||15||+100 to Attack Rating||+24 to Defense||+8 to Strength|
|Perfect Amethyst||18||+150 to Attack Rating||+30 to Defense||+10 to Strength|
|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|
|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|
|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|
|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|
|Chipped Skull||1||Steals 2% life, 1% Mana||Attacker Takes 4 Damage||Replenish Life +2, Regenerate Mana 8%|
|Flawed Skull||5||Steals 2% life, 2% Mana||Attacker Takes 8 Damage||Replenish Life +3, Regenerate Mana 8%|
|Skull||12||Steals 3% life, 2% Mana||Attacker Takes 12 Damage||Replenish Life +3, Regenerate Mana 12%|
|Flawless Skull||15||Steals 3% life, 3% Mana||Attacker Takes 16 Damage||Replenish Life +4, Regenerate Mana 12%|
|Perfect Skull||18||Steals 4% life, 3% Mana||Attacker Takes 20 Damage||Replenish Life +5, Regenerate Mana 19%|
|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|
Potions are split into two main categories, recovery and ailment curing.
 Healing Potion
Health potions come in five types, each restoring a fixed amount of health over the course of a few seconds.
- Minor Healing Potion : 30 health
- Light Healing Potion : 60 health
- Healing Potion : 100 health
- Greater Healing Potion : 180 health
- Super Healing Potion : 320 health
Some classes receive more health: Necromancer, Sorceress, and Druid receive the listed amount; Amazon, Paladin, and Assassin receive 50% more; Barbarian receives 100% more than the listed amount.
 Mana Potion
Mana potions come in five types, each restoring a fixed amount of mana over the course of a few seconds.
- Minor Mana Potion : 20 mana
- Light Mana Potion : 40 mana
- Mana Potion : 80 mana
- Greater Mana Potion : 150 mana
- Super Mana Potion : 250 mana
Some classes receive more mana: Barbarian receives the listed amount; Amazon, Paladin, and Assassin receive 50% more; Necromancer, Sorceress, and Druid receive 100% more.
 Rejuvenation Potion
Rejuvenation potions heal both health and mana instantly rather than over time.
- Rejuvenation Potion : restores 35% life/mana
- Full Rejuvenation Potion : restores 100% life/mana
 Stamina Potion
Maxes out your Stamina for thirty seconds.
 Antidote Potion
Instantly cures poison. Another way to remedy poison is to go to the town's magic user/potion seller; they will heal you and remove the poison effect.
 Thawing Potion
Removes the player from frozen/chilled status, and gives a bonus to cold resistance and maximum cold resistance for thirty seconds.