Introduction
Welcome to our Diablo 4 Gem Guide. Here we’ll look at each type of Gem you’ll acquire on your journey as well as their effects on Armor, Weapons, and Jewelry.
NOTE – FOR MORE ON MALIGNANT HEARTS, the Season 1 item that slot into gem slots, check out our Malignant Heart Guide!
Gem Types and Their Effects
There are currently 7 types of Gems in Diablo 4. Each one uniquely affects your Stats depending on which piece of gear you slot it in. Below is a chart showing each gem and its effects at each quality.
| Gem | Slot | Effect | Crude | Chipped | Gem | Flawless | Royal |
| AMETHYST | Weapon | % Damage Over Time | 4% | 5% | 6% | 7% | 8% |
| Armor | X% Damage Over Time Taken Reduced | 4.0% | 5.0% | 6.0% | 7.0% | 8.0% | |
| Jewelry | % Shadow Resistance | 11.5% | 14.3% | 17.1% | 19.9% | 22.7% | |
| EMERALD | Weapon | % Critical Strike Damage to Vulnerable Enemies | 7% | 9% | 11.0% | 13.0% | 15.0% |
| Armor | + Thorns | 3% | 4% | 4.0% | 4.5% | 5.0% | |
| Jewelry | % Poison Resistance | 4% | 5% | 6.0% | 7.0% | 8.0% | |
| RUBY | Weapon | % Overpower Damage | 6% | 7.5% | 9.0% | 10.5% | 12.0% |
| Armor | % Life increase | 12 | 28 | 44 | 60 | 76 | |
| Jewelry | % Fire Resistance | 11.5% | 14.3% | 17.1% | 19.9% | 22.7% | |
| TOPAZ | Weapon | % Basic Skill Damage | 12% | 15% | 18.0% | 21.0% | 24.0% |
| Armor | % Damage Reduction While Control Impaired | 2% | 2.5% | 3.0% | 3.5% | 4.0% | |
| Jewelry | % Lightning Resistance | 11.5% | 14.3% | 17.1% | 19.9% | 22.7% | |
| SAPPHIRE | Weapon | % Critical Strike Damage to Crowd-Controlled Enemies | 6% | 7.5% | 9.0% | 10.5% | 12.0% |
| Armor | % Damage Reduction While Fortified | 1.0% | 1.5% | 2.0% | 2.5% | 3.0% | |
| Jewelry | % Cold Resistance | 11.5% | 14.3% | 17.1% | 19.9% | 22.7% | |
| DIAMOND | Weapon | % Ultimate Damage | 10.0% | 12.5% | 15.0% | 17.5% | 20.0% |
| Armor | % Barrier Generation | 6.6% | 7.0% | 7.4% | 7.8% | 8.2% | |
| Jewelry | % Resistance to All Elements | 11.5% | 14.3% | 17.1% | 19.9% | 22.7% | |
| SKULL | Weapon | + Life On Kill | 2 | 5 | 8 | 11 | 14 |
| Armor | % Healing Received | 3.0% | 3.5% | 4.0% | 4.5% | 5.0% | |
| Jewelry | + Armor | 100 | 125 | 150 | 175 | 200 |
Gem Slots
To slot a gem, you will need a Gem Slot on your gear. Some gear drops with gem slots already on them while other pieces of gear will require you to visit the Jeweler to create the socket. Once at the Jeweler, you’ll need to pay 1 Scattered Prism to create a socket in a piece of gear of your choosing.
Some Pieces can not have sockets added While others can have more than one. Below is a chart showing each piece of gear and the number of sockets that can be added to each.
| Piece of Gear | Max Number of Gem Sockets |
| Head | 1 |
| Body | 2 |
| Gloves | 0 |
| Pants | 2 |
| Boots | 0 |
| Amulet | 1 |
| Ring | 1 |
| 1 Handed Weapon/Off-hand | 1 |
| 2 Handed Weapon/Bow | 2 |
NOTE – GEMS CAN ALSO BE UNSOCKETED AT THE JEWELER
Diablo 4 Gem Guide Conclusion
That concludes our Diablo 4 Gem Guide. For more on the new Season 1 mechanic, check out our Malignant Heart Guide.