High Quality (HQ) items are highlighted with a golden shine on the icon and with a symbol in text. Most gear and all craftable materials exist in HQ variants.
HQ gear has much better stats than its normal (NQ) counterparts.
For each gathering attempt, there is a chance that the item gathered will be HQ. This chance is modifiable through specific actions.
When used in crafting, HQ items provide up to a 50% bonus to item quality, depending on how many HQ ingredients are used to craft it.