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Quality

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Path Of Exile - Guide - Quality Basics

Quality applies to armour, weapons, flasks, gems and maps; in short, all equipment aside from amulets, rings, belts, quivers and jewels. It always varies from 0% (at which point it is not displayed on the item) to 20%. Each item type has a currency item associated with it to increase its quality. Quality can be an extremely important method of improving items, as it does not affect the requirements for using an item or the mana cost of skills.

All items are capped at 20% quality and each currency that affect quality will improve normal items by 5% each, magic items by 2%, and rare and unique items by 1%.

Increasing the quality on equipment also makes crafting sockets and links with Jeweller's Orb inventory icon.pngJeweller's OrbJeweller's OrbStack Size: 20Drop Level: 8Reforges the number of sockets on an itemRight click this item then left click a socketed item to apply it. The item's quality increases the chances of obtaining more sockets.
Shift click to unstack.
Jeweller's Orb inventory icon.png
and Orb of Fusing inventory icon.pngOrb of FusingOrb of FusingStack Size: 20Drop Level: 8Reforges the links between sockets on an itemRight click this item then left click a socketed item to apply it. The item's quality increases the chances of obtaining more links.
Shift click to unstack.
Orb of Fusing inventory icon.png
easier. Each 1% quality improves the result by 1%. This makes obtaining many sockets and links 20% more likely on 20% quality items.

Armour

On armour (helmets, body armours, gloves, boots and shields) quality increases the armour, evasion and energy shield by the listed percentage. It is additive to increases and reductions from another modifiers.

The quality of pieces of armour may be improved with an Armourer's Scrap inventory icon.pngArmourer's ScrapArmourer's ScrapStack Size: 40Drop Level: 1Improves the quality of an armourRight click this item then left click an armour to apply it. Has greater effect on lower rarity armours. The maximum quality is 20%.
Shift click to unstack.
Armourer's Scrap inventory icon.png
.

Example:
A piece of armour that naturally gives 100 armour that has 100% increased Armour and +50 to Armour would now, with 20% quality, give 330 armour.
(100 base armour + 50 armour) * (1 + 1/100*(100% increased armour + 20% quality)) = 150 * 2.2 = 330 armour

Weapons

Quality on weapons grant increased Physical Damage equal to a number of quality that stacks additively with increased Physical Damage modifier on the weapon.

The quality of weapons may be improved with a Blacksmith's Whetstone inventory icon.pngBlacksmith's WhetstoneBlacksmith's WhetstoneStack Size: 20Drop Level: 1Improves the quality of a weaponRight click this item then left click a weapon to apply it. Has greater effect on lower rarity weapons. The maximum quality is 20%.
Shift click to unstack.
Blacksmith's Whetstone inventory icon.png
.

Example:
A weapon that has 50–100 physical base damage, a 100% increased Physical Damage, an Adds 10–20 Physical Damage and 20% quality, will deal 132–264 damage.
(50 base minimum damage + 10 adds minimum damage) * (1 + 1/100*(100% increased physical damage + 20% quality)) = 60 * 2.2 = 132 minimum damage
(100 base maximum damage + 20 adds maximum damage) * (1 + 1/100*(100% increased physical damage + 20% quality)) = 120 * 2.2 = 264 maximum damage

Flasks

Quality of recovery flasks increase the amount of health and mana restored by the quality percentage. Utility flasks have their duration increased by the quality percentage instead. It is additive to increases and reductions from another sources.

The quality of flasks may be improved with a Glassblower's Bauble inventory icon.pngGlassblower's BaubleGlassblower's BaubleStack Size: 20Drop Level: 2Improves the quality of a flaskRight click this item then left click a flask to apply it. Has greater effect on lower rarity flasks. The maximum quality is 20%.
Shift click to unstack.
Glassblower's Bauble inventory icon.png
.

Example:
A flask which normally restores 100 Life and 50 Mana instead restores 120 Life and 60 Mana if it has 20% quality.

Maps

On maps, quality is treated as extra item quantity. It is added to the quantity from affixes of the map.

Maps may be improved with a Cartographer's Chisel inventory icon.pngCartographer's ChiselCartographer's ChiselStack Size: 20Drop Level: 52Improves the quality of a mapRight click this item then left click a map to apply it. Has greater effect on lower rarity maps. The maximum quality is 20%.
Shift click to unstack.
Cartographer's Chisel inventory icon.png
.

Skill Gems

Both active and support skill gems may have quality. Every skill is affected by quality differently, but frequently it somehow improves the damage dealt with the skill. Buffs and curses, obviously, do not have their damage improved. Even those that do have their damage improved will see different rates of improvement for a given amount of quality.

The quality of skill gems may be improved with a Gemcutter's Prism inventory icon.pngGemcutter's PrismGemcutter's PrismStack Size: 20Drop Level: 12Improves the quality of a gemRight click this item then left click a gem to apply it. The maximum quality is 20%.
Shift click to unstack.
Gemcutter's Prism inventory icon.png
. These upgrades always improve a skill's quality by 1%. Alternatively, a level 20 skill gem and a Gemcutter's Prism inventory icon.pngGemcutter's PrismGemcutter's PrismStack Size: 20Drop Level: 12Improves the quality of a gemRight click this item then left click a gem to apply it. The maximum quality is 20%.
Shift click to unstack.
Gemcutter's Prism inventory icon.png
can be sold for a level 1 gem with 20% quality.

It is possible to get a gems quality above 20% through corruption, the use of Enhance Support inventory icon.pngEnhance SupportEnhance SupportSupport
Icon: +
Mana Multiplier: 115%
Drop Level: 38Per 1% Quality:
This Gem gains 5% increased Experience
+(0 to 16)% to Quality of Supported Active Skill GemsThis is a Support Gem. It does not grant a bonus to your character, but skills in sockets connected to it. Place into an item socket connected to a socket containing the Active Skill Gem you wish to augment. Right click to remove from a socket.
Enhance Support inventory icon.png
and certain gear.

References