Quality

Quality is a stat that improves the signature stats of an equipment or adds additional bonuses to skill gems. Each item type has a currency item associated with it that increases its quality.

Mechanics

Quality can be applied to most equipment (quivers, jewels, and belts are the exceptions). Any item with at least 1% quality will have a Superior prefix when dropped on the ground but not when in the inventory.

Most items which can have quality have a default maximum of 20% quality, and some item classes can achieve up to 23% quality through corruption. Normal items of at least item level ? can drop with quality over 20% (up to 30%), which will have the Exceptional prefix until it is upgraded. Breach RingBreach RingRequires Level 40Maximum Quality is 40%s can have up to 40% quality. Effects which grant a global increase to gem quality apply independently of this maximum.

Quality is a unique multiplier to the related stat that is applied after all other modifiers, including the corruption magnitude modifier, and rounding. Values are truncated after the quality multiplier is applied.

Charm quality cannot be manually increased, though they can drop with quality and can have their quality modified through corruption.

For items that grant an inherent skill as an implicit modifier, additional quality will also add quality to the attached skill.

Quality effects

Item type	Currency	Effect per % quality
Martial weapons	Blacksmith's WhetstoneBlacksmith's WhetstoneStack Size: 20Improves the quality of a martial weaponRight click this item then left click a martial weapon to apply it. The maximum quality is 20%.	1% more local Physical Damage
Wands, Sceptres, and Staves	Arcanist's EtcherArcanist's EtcherStack Size: 20Improves the quality of a wand, staff or sceptreRight click this item then left click a wand, staff or sceptre to apply it. The maximum quality is 20%.	+1% to inherent skill quality
Armour (equipment)	Armourer's ScrapArmourer's ScrapStack Size: 20Improves the quality of an armourRight click this item then left click an armour to apply it. The maximum quality is 20%.	1% more local Defence
Amulets and Rings	Catalyst	1% increased modifier magnitude Modifier tag varies by catalyst
Flasks	Glassblower's BaubleGlassblower's BaubleStack Size: 20Improves the quality of a flaskRight click this item then left click a flask to apply it. The maximum quality is 20%.	1% more local Life/Mana Recovery
Charms		1% increased local Duration
Skill gems	Gemcutter's PrismGemcutter's PrismStack Size: 20Improves the quality of a skill gemRight click this item then left click a skill gem to apply it. The maximum quality is 20%.	Varies by skill

Amount

The amount of quality given by a quality-increasing currency item depends on the equipment's item level. The higher the item level, the less quality each currency item will give. Gemcutter's PrismGemcutter's PrismStack Size: 20Improves the quality of a skill gemRight click this item then left click a skill gem to apply it. The maximum quality is 20%.s always add 5% to a skill gem.

Corrupting a flask, charm, or skill gem may cause it to gain or lose up to 10% quality, and can exceed the 20% cap, up to 23%. Support gems cannot have quality added to them.

As of version 0.2.0g, it is no longer possible to corrupt caster weapons (staff, wand, sceptre) to have quality above 20%. Existing items with 21%-23% quality are considered legacy variants.

Version history

Version	Changes
0.3.0	Items found in very high level areas that can have random quality can now have up to 30% quality. Quality currency still cannot apply more than 20% Quality to an item.
0.2.0g	Sceptres, Wands, and Staves can now correctly roll an additional Rune Socket as a Corruption outcome. This replaced the outcome that grants ±10% to caster weapon Quality, up to 23%, which also affected the quality of granted skills.[Undocumented]
0.2.0	Fixed a bug where Quality on Sceptres multiplied the amount of Spirit they granted instead of granting Quality to their inherent Skill.
0.1.1	Flasks with Quality are now able to be salvaged.
0.1.0	Introduced to the game.