PoE 3.19 added six new Grand Spectrum jewels. Grand Spectrum is the name shared by nine different unique jewels that each grant scaling bonuses based on the number of jewels called 'Grand Spectrum' placed into jewel sockets on the character's passive skill tree.
|Image||Name & Stats||Trade Search|
|Grand Spectrum (Cobalt Jewel, minion crit multi)
|Grand Spectrum (Cobalt Jewel, power charge)
|Grand Spectrum (Cobalt Jewel, crit chance)
|Grand Spectrum (Crimson Jewel, resistance)
|Grand Spectrum (Crimson Jewel, endurance charge)
|Grand Spectrum (Crimson Jewel, life)
|Grand Spectrum (Viridian Jewel, ailment avoidance)
|Grand Spectrum (Viridian Jewel, frenzy charge)
|Grand Spectrum (Viridian Jewel, elemental damage)
Jewel limit: A character can't have more than three 'Grand Spectrum' jewels socketed. This limit is shared across all 'Grand Spectrum' jewels. For example, if a character has 3 Cobalt Grand Spectrum jewels socketed in their passive tree, they cannot use any Viridian or Crimson Grand Spectrum jewels.
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The total magnitude Mt of the bonuses granted by socketed Grand Spectrum jewels of type t is:
Mt = bt × nt × g
For example: if plaer has 1× Grand Spectrum(Cobalt Jewel, crit chance) and 2× Grand Spectrum (Viridian Jewel, elemental damage). This would result in:
If you equip all three Grand Spectrum of any type, you can use the following table, simply select the number of Grand Spectrum of the given type you intend to equip, and add the results:
|Grand Spectrum(Crimson Jewel, resistance)||+21% to all Elemental Resistances||+42% to all Elemental Resistances||+63% to all Elemental Resistances|
|Grand Spectrum(Cobalt Jewel, crit chance)||75% increased Critical Strike Chance||150% increased Critical Strike Chance||225% increased Critical Strike Chance|
|Grand Spectrum(Viridian Jewel, elemental damage)||45% increased Elemental Damage||90% increased Elemental Damage||135% increased Elemental Damage|
|Grand Spectrum(Crimson Jewel, endurance charge)||+3 to Minimum Endurance Charges||+6 to Minimum Endurance Charges||+9 to Minimum Endurance Charges|
|Grand Spectrum(Viridian Jewel, frenzy charge)||+3 to Minimum Frenzy Charges||+6 to Minimum Frenzy Charges||+9 to Minimum Frenzy Charges|
|Grand Spectrum (Cobalt Jewel, power charge)||+3 to Minimum Power Charges||+6 to Minimum Power Charges||+9 to Minimum Power Charges|
|Grand Spectrum (Viridian Jewel, ailment avoidance)||36% chance to Avoid Elemental Ailments||72% chance to Avoid Elemental Ailments||100% (108%) chance to Avoid Elemental Ailments|
|Grand Spectrum (Crimson Jewel, life)||15% increased Maximum Life||30% increased Maximum Life||45% increased Maximum Life|
|Grand Spectrum(Cobalt Jewel, minion crit multi)||Minions have +30% to Critical Strike Multiplier||Minions have +60% to Critical Strike Multiplier||Minions have +90% to Critical Strike Multiplier|
| Grand Spectrum is a unique Cobalt Jewel.
Flavour text: A mass of flesh writhing with savage fury.
Place into an allocated jewel socket on the passive skill tree. Right click to remove from the socket.
A critical strike is a skill or default attack dealing increased damage and possibly inflicting elemental ailments. Whenever the player or a monster uses a skill, they have a chance to deal a critical strike by default.
Critical strikes are rolled on a per-action basis, not per-target. So each time a creature uses a skill, the critical strike roll is made once and only once. If someone rolls a critical strike, critical damage will be dealt to all targets hit by that skill.
Critical strikes deal more damage than normal, based on critical strike multiplier. All characters have a base critical strike multiplier of 150%. The damage will be multiplied according to
CriticalStrikeDamage = Damage * (BaseCriticalStrikeMultiplier + AdditionalCriticalStrikeMultiplier)
Where Damage is the base damage, BaseCriticalStrikeMultiplier = 150% and AdditionalCriticalStrikeMultiplier is the sum of all +#% to Critical Strike Multiplier.
This multiplier will be applied to all damage types of a hit. For instance, with +100% to Critical Strike Multiplier, if the player scores a critical strike with an attack that normally deals 100 physical damage and 10 cold damage, he will instead deal 250 physical damage and 25 cold damage.
Critical strike multipliers do not affect the critical strike multiplier on ailments, including global critical strike modifiers. Ailments have a base 150% multiplier when applied by a critical strike. The only way to increase the critical strike multiplier on ailments is with the Perfect Agony keystone.
Monsters have a base critical strike multiplier of 130%. It can be increased by various monster affixes and monster auras.