List of modifiers that increase the level of skill gems.
Note that the 3 modifiers with the weighting of 0 can still be obtained:
- Catarina's: This is the signature mod of Catarina, Master of the Dead; at level 4 she sells items with this modifier
- Competitor's: Some race starting items have this modifier
- Haku's: This is the signature mod of Haku, Armourmaster; at level 4 he sells items with this modifier
| Name |  | Stats | Spawn Weighting |
|---|---|---|---|
| Subterranean | 1 | +2 to Level of Socketed Chaos Gems | abyss_jewel 0 jewel 0 boots 2000 default 0 |
| Subterranean | 1 | +2 to Level of Socketed Cold Gems | abyss_jewel 0 jewel 0 boots 2000 default 0 |
| Subterranean | 1 | +2 to Level of Socketed Fire Gems | abyss_jewel 0 jewel 0 boots 2000 default 0 |
| Subterranean | 1 | +2 to Level of Socketed Lightning Gems | abyss_jewel 0 jewel 0 boots 2000 default 0 |
| GemLevelCorruption | 1 | +1 to Level of Socketed Gems | boots 0 gloves 0 body_armour 0 shield 0 default 0 |
| Mad Lord's | 2 | +1 to Level of all Chaos Spell Skill Gems | attack_dagger 0 wand 200 dagger 200 focus 200 default 0 |
| Mad Lord's | 2 | +(1-2) to Level of all Chaos Spell Skill Gems | attack_staff 0 staff 200 default 0 |
| Splintermind's | 77 | +3 to Level of all Chaos Spell Skill Gems | attack_staff 0 staff 100 default 0 |
| Frost Singer's | 2 | +1 to Level of all Cold Spell Skill Gems | attack_dagger 0 wand 250 sceptre 250 dagger 250 focus 250 default 0 |
| Frost Singer's | 2 | +(1-2) to Level of all Cold Spell Skill Gems | attack_staff 0 staff 250 default 0 |
| Winter Beckoner's | 77 | +3 to Level of all Cold Spell Skill Gems | attack_staff 0 staff 125 default 0 |
| Flame Shaper's | 2 | +1 to Level of all Fire Spell Skill Gems | attack_dagger 0 wand 250 sceptre 250 dagger 250 focus 250 default 0 |
| Flame Shaper's | 2 | +(1-2) to Level of all Fire Spell Skill Gems | attack_staff 0 staff 250 default 0 |
| Lava Conjurer's | 77 | +3 to Level of all Fire Spell Skill Gems | attack_staff 0 staff 125 default 0 |
| Thunderhand's | 2 | +1 to Level of all Lightning Spell Skill Gems | attack_dagger 0 wand 250 sceptre 250 dagger 250 focus 250 default 0 |
| Thunderhand's | 2 | +(1-2) to Level of all Lightning Spell Skill Gems | attack_staff 0 staff 250 default 0 |
| Tempest Master's | 77 | +3 to Level of all Lightning Spell Skill Gems | attack_staff 0 staff 125 default 0 |
| Lithomancer's | 2 | +1 to Level of all Physical Spell Skill Gems | attack_dagger 0 wand 200 sceptre 200 dagger 200 focus 200 default 0 |
| Lithomancer's | 2 | +(1-2) to Level of all Physical Spell Skill Gems | attack_staff 0 staff 200 default 0 |
| Tecton's | 77 | +3 to Level of all Physical Spell Skill Gems | attack_staff 0 staff 100 default 0 |
| Magister's | 55 | +1 to Level of all Spell Skill Gems | attack_dagger 0 wand 50 sceptre 50 dagger 50 default 0 |
| Magister's | 55 | +(1-2) to Level of all Spell Skill Gems | attack_staff 0 staff 50 default 0 |
| Subterranean | 60 | +2 to Level of Socketed Curse Gems | default 0 |
| Catarina's | 60 | +1 to Level of Socketed Support Gems | weapon 2000 shield 2000 default 0 |
| Catarina's | 80 | +2 to Level of Socketed Support Gems | weapon 2000 shield 2000 default 0 |
| Catarina's | 1 | +1 to Level of Socketed Support Gems | weapon 0 shield 0 default 0 |
| Catarina's | 80 | +2 to Level of Socketed Support Gems | weapon 0 shield 0 default 0 |
| of the Underground | 60 | +2 to Level of Socketed Aura Gems | default 0 |
| Fletcher's | 9 | +1 to Level of Socketed Bow Gems | bow 1000 default 0 |
| Sharpshooter's | 64 | +2 to Level of Socketed Bow Gems | bow 1000 default 0 |
| Nihilist's | 4 | +1 to Level of Socketed Chaos Gems | attack_staff 1000 attack_dagger 1000 default 0 |
| Anarchist's | 55 | +2 to Level of Socketed Chaos Gems | attack_staff 1000 attack_dagger 1000 default 0 |
| Frost Weaver's | 2 | +1 to Level of Socketed Cold Gems | attack_staff 1000 attack_dagger 1000 default 0 |
| Winterbringer's | 55 | +2 to Level of Socketed Cold Gems | attack_staff 1000 attack_dagger 1000 default 0 |
| Flame Spinner's | 2 | +1 to Level of Socketed Fire Gems | attack_staff 1000 attack_dagger 1000 default 0 |
| Lava Caller's | 55 | +2 to Level of Socketed Fire Gems | attack_staff 1000 attack_dagger 1000 default 0 |
| Paragon's | 50 | +1 to Level of Socketed Gems | attack_staff 1000 attack_dagger 1000 staff 0 wand 0 dagger 0 sceptre 0 weapon 1000 default 0 |
| Exemplary | 2 | +1 to Level of Socketed Gems | unset_ring 1000 default 0 |
| Quintessential | 50 | +2 to Level of Socketed Gems | unset_ring 1000 default 0 |
| Flawless | 76 | +3 to Level of Socketed Gems | unset_ring 250 default 0 |
| Thunder Lord's | 2 | +1 to Level of Socketed Lightning Gems | attack_staff 1000 attack_dagger 1000 default 0 |
| Tempest King's | 55 | +2 to Level of Socketed Lightning Gems | attack_staff 1000 attack_dagger 1000 default 0 |
| Weaponmaster's | 63 | +2 to Level of Socketed Melee Gems | bow 0 wand 0 focus 0 shield 1000 weapon 1000 default 0 |
| Combatant's | 8 | +1 to Level of Socketed Melee Gems | bow 0 wand 0 focus 0 shield 1000 weapon 1000 default 0 |
| Reanimator's | 14 | +1 to Level of Socketed Minion Gems | helmet 1000 default 0 |
| Summoner's | 65 | +2 to Level of Socketed Minion Gems | helmet 1000 default 0 |
| Necromancer's | 86 | +3 to Level of Socketed Minion Gems | helmet 1000 default 0 |
| Subterranean | 60 | +2 to Level of Socketed Minion Gems | default 0 |
| Citaqualotl's | 50 | +2 to Level of Socketed Minion Gems | default 0 |
| Citaqualotl's | 1 | +2 to Level of Socketed Minion Gems | default 0 |
| Competitor's | 1 | +1 to Level of Socketed Spell Gems | default 0 |
| Catarina's | 1 | +1 to Level of Socketed Support Gems | default 0 |
| Eldritch | 80 | +1 to Level of Socketed Support Gems | body_armour_elder 400 default 0 |
| Matatl's | 1 | +2 to Level of Socketed Trap Gems | default 0 |
| Martinet's | 60 | +1 to Level of all Minion Skill Gems | two_hand_weapon 0 weapon_can_roll_minion_modifiers 125 default 0 |
| of the Essence | 63 | +2 to Level of Socketed Aura Gems | default 0 |
| Hunter's | 68 | +2 to Level of Socketed Chaos Gems | boots_basilisk 500 default 0 |
| Redeemer's | 68 | +2 to Level of Socketed Cold Gems | boots_eyrie 500 default 0 |
| Warlord's | 68 | +2 to Level of Socketed Fire Gems | boots_adjudicator 500 default 0 |
| Haku's | 1 | +(3-6)% to Quality of Socketed Support Gems | default 0 |
| Crusader's | 68 | +2 to Level of Socketed Lightning Gems | boots_crusader 500 default 0 |
| Redeemer's | 80 | +1 to Level of Socketed Support Gems | body_armour_eyrie 250 default 0 |
| SocketedVaalGemsIncreaseCorrupted | 1 | +(1-2) to Level of Socketed Vaal Gems | helmet 0 gloves 0 boots 0 body_armour 0 shield 0 default 0 |
| V2GemLevelCorrupted | 1 | +1 to Level of Socketed Gems | boots 1000 gloves 1000 body_armour 1000 shield 1000 default 0 |