Diablo 4 has seven Gem types, which are items that can be slotted in gear with sockets to add different bonuses. In addition, each of these gems has five different level of qualities.

The power and effectiveness of these stat buffs depend on the quality of the Gem, which can be improved by combining Gems of the same type.

Below, we’re going to go over each Gem type, levels of quality, all their stat bonuses, and how to improve their quality.

in the Jeweler Vendor's inventory screen in Diablo 4
Credit: NottheWinner Gaming

All Gem Levels in Diablo 4

Each of the seven Gems types in Diablo 4 has five levels of quality that directly impact the potency of the bonuses they apply to your gear:

  • Crude Gems
  • Chipped Gems
  • Standard Gems
  • Flawless Gems
  • Royal Gems

Here are all the Gem quality levels in Diablo 4, the character level required to use and craft them, and what is needed to upgrade each gem:

Gem LevelLVL to UseLVL to CraftCraft Requirement
Crude GemLevel 15Not ApplicableNot Applicable
Chipped GemLevel 20Level 203 Crude Gems & 4,500 Gold
Standard GemLevel 40Level 403 Chipped Gems & 12,500 Gold
Flawless GemLevel 50Level 603 Standard Gems & 18,000 Gold
Royal GemLevel 60Level 703 Flawless Gems & 50,000 Gold

You will find varying levels of Gems as you play and explore. Furthermore, you’ll find higher-quality gems as you level up and progress through the game.

As you level up your Gems, their bonuses will increase in power and potency. These quality levels can be upgraded at any Jeweler in the game.

Looking at a Flawless Emerald in the Jeweler's inventory screen in diablo 4
Credit: NottheWinner Gaming

Full Gem Stat Bonus List

Here are all seven Gem types in Diablo 4 and their corresponding stat bonuses, according to gear type:

Gem TypeWeapon BonusArmor BonusJewelry Bonus
AmethystIncreases damage over timeReduces damage taken over timeIncreases Shadow resistance
DiamondIncreases Ultimate Skill damageIncreases Barrier generationIncreases resistance to all elements
EmeraldIncreases Critical Strike damage to vulnerable enemiesIncreases ThornsIncreases poison resistance
RubyIncreases Overpower damageIncreases maximum lifeIncreases fire resistance
SapphireIncreases Critical Strike damage to Crowd Controlled enemiesReduces damage taken while FortifiedIncreases cold resistance
SkullIncreases Life on KillIncreases healing receivedIncreases armor
TopazIncreases Basic Skill damageReduces damage taken while Control ImpairedIncreases lightning resistance

Here are all the detailed stat bonus percentages for each gem quality level in Diablo 4:

Amethyst – All Gem Level Bonus

  • Weapon Bonus (Increases damage over time)
    • Crude: +4.0%
    • Chipped: +5.0%
    • Amethyst: +6.0%
    • Flawless: +7.0%
    • Royal: +8.0%
  • Armor Bonus (Reduces damage taken over time)
    • Crude: 4.0%
    • Chipped: 5.0%
    • Amethyst: 6.0%
    • Flawless: 7.0%
    • Royal: 8.0%
  • Jewelry Bonus (Increases Shadow resistance)
    • Crude: 11.5%
    • Chipped: 14.3%
    • Amethyst: 16.9%
    • Flawless: 19.6%
    • Royal: 22.1%
Amethyst Diablo 4 Jeweler

Diamond – All Gem Level Bonus

  • Weapon Bonus (Increases Ultimate Skill damage)
    • Crude: +4.0%
    • Chipped: +9.0%
    • Diamond: +11.0%
    • Flawless: +13.0%
    • Royal: +15.0%
  • Armor Bonus (Increases Barrier generation)
    • Crude: +3.0%
    • Chipped: +3.5%
    • Diamond: +4.0%
    • Flawless: +4.5%
    • Royal: +5.0%
  • Jewelry Bonus (Increases resistance to all elements)
    • Crude: 4.0%
    • Chipped: 5.0%
    • Diamond: 6.0%
    • Flawless: 7.0%
    • Royal: 8.0%
Diamond Diablo 4 Jeweler

Emerald – All Gem Level Bonus

  • Weapon Bonus (Increases Critical Strike damage to vulnerable enemies)
    • Crude: +6.0%
    • Chipped: +7.5%
    • Emerald: +9.0%
    • Flawless: +10.5%
    • Royal: +12%
  • Armor Bonus (Increases Thorns)
    • Crude: +12
    • Chipped: +28
    • Emerald: +70
    • Flawless: +128
    • Royal: +250
  • Jewelry Bonus (Increases poison resistance)
    • Crude: 11.5%
    • Chipped: 14.3%
    • Emerald: 16.9%
    • Flawless: 19.6%
    • Royal: 22.1%
Emerald Diablo 4 Jeweler

Ruby – All Gem Level Bonus

  • Weapon Bonus (Increases Overpower damage)
    • Crude: +12%
    • Chipped: +15%
    • Ruby: +18%
    • Flawless: +21%
    • Royal: +24%
  • Armor Bonus (Increases maximum life)
    • Crude: 2%
    • Chipped: 2.5%
    • Ruby: 3%
    • Flawless: 3.5%
    • Royal: 4%
  • Jewelry Bonus (Increases fire resistance)
    • Crude: 11.5%
    • Chipped: 14.3%
    • Ruby: 16.9%
    • Flawless: 19.6%
    • Royal: 22.1%
Ruby Diablo 4 Jeweler

Sapphire – All Gem Level Bonus

  • Weapon Bonus (Increases Critical Strike damage to Crowd Controlled enemies)
    • Crude: +6%
    • Chipped: +7.5%
    • Sapphire: +9%
    • Flawless: +10.5%
    • Royal: +12%
  • Armor Bonus (Reduces damage taken while Fortified)
    • Crude: 1%
    • Chipped: 1.5%
    • Sapphire: 2%
    • Flawless: 2.5%
    • Royal: 3%
  • Jewelry Bonus (Increases cold resistance)
    • Crude: 11.5%
    • Chipped: 14.3%
    • Sapphire: 16.9%
    • Flawless: 19.6%
    • Royal: 22.1%
Sapphire Diablo 4 Jeweler

Skull – All Gem Level Bonus

  • Weapon Bonus (Increases Life on Kill)
    • Crude: +2
    • Chipped: +5
    • Skull: +8
    • Flawless: +11
    • Royal: +14
  • Armor Bonus (Increases healing received)
    • Crude: 3%
    • Chipped: 3.5%
    • Skull: 4%
    • Flawless: 4.5%
    • Royal: 5%
  • Jewelry Bonus (Increases armor)
    • Crude: +75
    • Chipped: +125
    • Skull: +170
    • Flawless: +210
    • Royal: +245
Skull Diablo 4 Jeweler

Topaz – All Gem Level Bonus

  • Weapon Bonus (Increases Basic Skill damage)
    • Crude: +10%
    • Chipped: +12.5%
    • Sapphire: +15%
    • Flawless: +17.5%
    • Royal: +20%
  • Armor Bonus (Reduces damage taken while Control Impaired)
    • Crude: 6%
    • Chipped: 7%
    • Sapphire: 8%
    • Flawless: 9%
    • Royal: 10%
  • Jewelry Bonus (Increases lightning resistance)
    • Crude: 11.5%
    • Chipped: 14.3%
    • Sapphire: 16.9%
    • Flawless: 19.6%
    • Royal: 22.1%
Topaz Diablo 4 Jeweler

How to Find the Jeweler to Upgrade Gems in D4

You can upgrade Gems by combining multiple Gems of the same type and quality at the Jeweler.

You can find the Jeweler in most large towns and settlements in Diablo 4. Just look out for the Gem symbol on your map.

Jeweler Map Location Diablo 4
Jeweler icon in Kyovashad

Each Gem type has five tiers of quality and can be upgraded at the Jeweler in the ‘Craft Gems’ tab of the shopkeeper’s inventory screen.

Crafting a Chipped Amethyst at the Jeweler in Diablo 4
Credit: Rob Unwraps

To upgrade your Gems level, you’ll need to combine three Gems of quality and spend a fee of gold to get the next quality level of that Gem.

Being able to slot Gems in and out of your weapons and armor with ease will ensure greater build variety as you stomp about Sanctuary. They have the potential to add a huge amount of power to your gear, especially with the higher-quality Gems you’ll be using in the late game.

What are Gems in Diablo 4?

Gems are items that you can slot into open sockets (if they have them) in your weapons and armor. There are seven Gem types, each with giving different stat bonuses depending on the type of gear piece you slot them into.

You will find Gems from Ore Veins out in the open world and as random loot drops as you go about your business in Sanctuary.

Lastly, you can upgrade your gem level at any Jeweler in the town of your choice.

Credit: NottheWinner Gaming
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Staff Writer
Passionate gamer and writer, Alpay has been featured on GamingIntel, Stuff.tv, and TheGamer. When not writing, he delves into virtual worlds, enjoys high-concept TV shows, and splurges on Steam sales.
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