Gem System Guide
The Gem System improves the Damage and Cooldown of skills. They are found from various daily and weekly activities in Lost Ark. Choose which skills you want to augment wisely to optimize your character. Lets get started!
Gem Sources
Gems only become available starting from Tier 2 content and onwards. To benefit from a gem, you first have to obtain them, right? This can be done in various ways, such as:
- Daily Chaos Dungeons (Aura of Resonance required).
- Buying on the Auction House.
- Defeating Field Bosses, a part of Daily Events.
- Completing Ebony Cube.
- Kayangel Exchange NPC
Gem Types
There are only two types of gems, granting either Damage Increase or Cooldown Reduction. The values of these stats increase with each consecutive level of the gem.
There is also 3 tiers of Gems, correspondent to each in-game tier. Tier 2 and Tier 3 gems have the same scaling, while Tier 4 gems scale differently and also provide Attack Power.
Gem Fusion
You can access the Gem Fusion Window from the bottom left of your inventory, next to the dismantle button. Place 3 gems of the same level in the open slots and press Synthesize to combine them into a gem one level higher.
- Gem Fusion has a 100% chance of success.
- Gems from two different Tiers cannot be synthesized.
- The outcome of the Fusion is random and cannot be influenced by any means.
- You can use both gem types simultaneously to create higher level gems.
- Combining gems from different classes grants your class gem as the outcome.
- Damage gems cannot be changed into Cooldown and vice versa.
- A level 10 gem cannot be further upgraded.
- Selecting any of the level 2 to 9 buttons automatically synthesizes all gems in your inventory to create the highest possible outcome up to that point.
- The Auto button creates a filter that automatically combines any obtained gem lower than your preferred level. This feature is useful when you have already established a gem setup and don't want your inventory to fill up when doing Chaos Dungeons.
Gem Conversion
Tier 3 gems can be converted to Tier 4 gems. This will lower the level of the gem while generally keeping the same power (or increasing it for the earlier levels). Here's a handy conversion table:
| Tier 3 | Tier 4 | |||||
| Damage Gem | Cooldown Gem | Damage Gem | Cooldown Gem | |||
| Level 1 | 3% Damage | 2% Cooldown Reduction | - | |||
| Level 2 | 6% Damage | 4% Cooldown Reduction | - | |||
| Level 3 | 9% Damage | 6% Cooldown Reduction | → | Level 1 | 8% Damage | 6% Cooldown Reduction |
| Level 4 | 12% Damage | 8% Cooldown Reduction | → | Level 2 | 12% Damage 0.05% Attack Power | 8% Cooldown Reduction 0.05% Attack Power |
| Level 5 | 15% Damage | 10% Cooldown Reduction | → | Level 3 | 16% Damage 0.1% Attack Power | 10% Cooldown Reduction 0.1% Attack Power |
| Level 6 | 18% Damage | 12% Cooldown Reduction | → | Level 4 | 20% Damage 0.2% Attack Power | 12% Cooldown Reduction 0.2% Attack Power |
| Level 7 | 21% Damage | 14% Cooldown Reduction | → | Level 5 | 24% Damage 0.3% Attack Power | 14% Cooldown Reduction 0.3% Attack Power |
| Level 8 | 24% Damage | 16% Cooldown Reduction | → | Level 6 | 28% Damage 0.45% Attack Power | 16% Cooldown Reduction 0.45% Attack Power |
| Level 9 | 30% Damage | 18% Cooldown Reduction | → | Level 7 | 32% Damage 0.6% Attack Power | 18% Cooldown Reduction 0.6% Attack Power |
| Level 10 | 40% Damage | 20% Cooldown Reduction | → | Level 8 | 36% Damage 0.8% Attack Power | 20% Cooldown Reduction 0.8% Attack Power |
| - | Level 9 | 40% Damage 1% Attack Power | 22% Cooldown Reduction 1% Attack Power | |||
| - | Level 10 | 44% Damage 1.2% Attack Power | 24% Cooldown Reduction 1.2% Attack Power | |||
Gem conversion always maintains the type of gem. If you convert a Tier 3 Damage gem, you will get a Tier 4 Damage gem for the same skill. The same applies for Cooldown Gems.
Gem Reroll and Cost
This feature can be accessed by visiting the Gem Expert NPC found in any major city (
icon on the map), or through your pet's special interface (Alt+P).
On the left, you may select any gem you own from your inventory, warehouse, or currently equipped to reroll the skill it grants. This process costs Silver and gets exponentially more expensive with higher gem levels. When changing the skill, you have an equal chance to obtain any of your class skills in return. Repeat this until you get the skill you want.
- Rerolling a gem from a different class will grant a gem of your class in return.
- It's more cost-efficient to sell unusable skill gems on the Auction House and purchase the exact one you need in return, rather than spending hundreds of thousands of Silver on rerolls.
- Transformation classes like Artillerist and Shadowhunter can obtain Damage Increase and Cooldown Reduction gems that affect every skill within their transformation state. This makes gearing them extremely cost-efficient depending on their build choice.
| Gem Level | Reroll Silver Cost |
| 1 | 7,000 Silver |
| 2 | 8,500 Silver |
| 3 | 10,000 Silver |
| 4 | 20,000 Silver |
| 5 | 30,000 Silver |
| 6 | 60,000 Silver |
| 7 | 90,000 Silver |
| 8 | 150,000 Silver |
| 9 | 210,000 Silver |
| 10 | 340,000 Silver |
Equipping a Gem
Equip Gems by right-clicking them from your inventory or dragging them into the Gem Tab, found in your Character Info sheet. You have access to 11 open slots to freely divide between your Damage Increase and Cooldown Reduction gems. Each skill is limited to one damage and one cooldown gem.
Tier Restrictions
When Tier 2 gems get used in Tier 3 or Tier 4 content, their effectiveness is reduced by 50%. This effectively forces you to replace them with higher tier gems.
Tier 3 Gems have no such restriction in Tier 4, but it's generally advisable to convert them into Tier 4 gems since they provide the same or better value due to the additional Attack power and scaling.
However, you should take into consideration the damage share of the skill when converting Level 10 Annihilation Gems, since skills with a high damage share (roughly 25% or more) would end up losing damage when converted to a Level 8 Tier 4 Gem. In those cases it's recommended to keep the Tier 3 Level 10 gem until you can get a Tier 4 Level 9 Gem or higher.
Free Tier 3 Gems
After finishing Punika's Main Story Quest (ending with 
Festival Adventure), you will be granted a full set of Level 5 Gems. These gems are bound to your character, cannot be fused, and allow you to freely choose the skills they affect, instead of having to roll them using Silver.
Solo Raid Shop
Once you start clearing Raids, you will receive Clear Medals for content ranging from 
Legion Raid: Valtan up to 
Abyssal Dungeon: Ivory Tower. These can be used in any major city to purchase Level 6 Gems and Level 7 Gems, allowing you to upgrade your gems to higher levels.
These gems have the same characteristics and limitations as the previously mentioned Level 5 Gems. However, there are item level restrictions that apply to each character:
- Level 6 Gems can be purchased after reaching Item Level 1415.
- Level 7 Gems can be purchased after reaching Item Level 1540.
Summary
- There are two types of gems: Damage Increase or Cooldown Reduction.
- You can equip up to 11 different gems to your character.
- Three gems of the same level can be synthesized for one gem of a higher level with 100% chance of success.
- Gem reroll cost is fixed depending on the level of your gem. It is more cost-effective to sell unusable skill gems on the Auction House and purchase the exact one you need in return.
- Tier 2 gems used in Tier 3 content have their effectiveness reduced by 50%.
- Maximum gem level is 10!
Credits
Written by Choilicious
Updated by Sekwah