Gems — Complete Reference

Gems follow a classic ARPG channel pattern: each channel gem adds that damage type in weapons and matching resistance in shields, with a utility bonus in helm/armor. Core gems map to Thermal/Cryo/Arc/Toxin; four new gems cover Isotopic, Fission, Plasma, and Void. All use five tiers (Chipped → Flawed → Standard → Flawless → Perfect).

Channel Map

• Ruby → Thermal
• Sapphire → Cryo
• Topaz → Arc + Yield in helm/armor
• Emerald → Toxin
• Gammitite → Isotopic (TFA-only)
• Nucleite → Fission (TFA-only)
• Helion → Plasma (TFA-only)
• Nullite → Void (TFA-only)
• Amethyst / Diamond / Siphonite → utility (AR/Str/Def, All Resist, Leech) — not channel gems

Tiers & Upgrade

• Chipped / Flawed / Standard / Flawless / Perfect.
• Crafting Page: 3× same tier → 1× next tier (optional material tax).
• Perfect gems = mid-tier trade + craft fuel.

Ruby — Thermal / Life

• Weapon: +Thermal damage (Perfect: high Thermal min–max band).
• Helm/Armor: +Life (Perfect: +38 Life).
• Shield: +Thermal Resist.
• Role: Thermal damage / life sustain.

Sapphire — Cryo / Energy

• Weapon: +Cryo damage + chill length.
• Helm/Armor: +Max Energy.
• Shield: +Cryo Resist.
• Role: Cryo damage / Energy pool.

Topaz — Arc / Yield

• Weapon: +Arc damage.
• Helm/Armor: +Yield (Perfect: +24% Yield).
• Shield: +Arc Resist.
• Role: Arc damage / Yield farming.

Emerald — Toxin / Dexterity

• Weapon: +Toxin damage over time.
• Helm/Armor: +Dexterity (Perfect: +10 Dex).
• Shield: +Toxin Resist.
• Role: Toxin damage / Dexterity.

Gammitite — Isotopic / Contamination Utility

• Weapon: +Isotopic damage (radiation-tagged hits; contamination mark synergy).
• Helm/Armor: +Isotopic skill damage % OR +Energy (tunable); Perfect baseline: +Isotopic Pierce-lite / +Energy regen.
• Shield: +Isotopic Resist.
• Fiction: gamma-lattice condensate. Role: Isotopic builds & Hell Isotopic resist.

Nucleite — Fission / Burst Utility

• Weapon: +Fission damage (unstable burst coefficients on hit).
• Helm/Armor: +Crushing Blow-lite / Deadly Strike-lite band OR +Strength (tunable); Perfect: small CB%.
• Shield: +Fission Resist.
• Fiction: nuclear-seed crystal. Role: Fission spike kits & Fission resist.

Helion — Plasma / Shield Pressure

• Weapon: +Plasma damage (sustained high-energy; strong vs shields).
• Helm/Armor: +Faster Cast / Handling band OR +Life (tunable); Perfect: small FCR or FRW.
• Shield: +Plasma Resist.
• Fiction: bottled stellar plasma. Role: Plasma guns/skills & Plasma resist.

Nullite — Void / Null Utility

• Weapon: +Void damage (null-space shear; sparse natural enemy resists).
• Helm/Armor: +Anomalous-replacement utility — Channel Damage Reduction-lite OR +All Skills (very rare Perfect only); baseline Perfect: +CDR-lite or +Void skill damage%.
• Shield: +Void Resist.
• Fiction: collapsed-space glass. Role: Void casters/melee convert & Void resist.

Amethyst — AR / Strength / Defense

• Weapon: +Attack Rating (Perfect: +150 AR).
• Helm/Armor: +Strength (Perfect: +10 Str).
• Shield: +Defense.
• Role: accuracy / equip reqs — unchanged utility gem.

Diamond — Construct Bonus / All Resist

• Weapon: damage/AR vs undead/construct analogues.
• Helm/Armor: +AR.
• Shield: +All Resist across Thermal/Cryo/Arc/Toxin/Isotopic/Fission/Plasma/Void (Perfect: +19 all).
• Role: Hell resist pushes — now covers all eight non-kinetic channels.

Siphonite — Leech / Regen / Thorns

• Weapon: Life Steal + Energy Steal.
• Helm/Armor: replenish life + Energy regen.
• Shield: attacker takes damage.
• Fiction: parasitic condensate that drinks kinetic impact. Role: early leech / sustain solution.

Matrix Count

• 11 gem types × 5 tiers × 4 slot contexts = 220 fixed outcomes.
• 8 channel gems teach damage↔resist pairing; 3 utility gems (Amethyst, Diamond, Siphonite) teach ARPG basics.

Socketing is permanent until Crafting Page unsocket recipe destroys socketables.