Equipment Rarity
From BlackTalon Wiki
Similarly to the monster class system, the gear that you drop will also be categorized into different rarities, which matches the monster's class. These equipment can only be obtained through a monster orb and the rarity will depend on the kind of monster you killed. Currently, there are four equipment rarities available, as listed below: right|frameless
As mentioned in the attributes page, equipment pieces can have attributes imbued to them and the gear rarity makes it so your total attribute cap in a single piece gets raised. Therefore, the higher the rarity of an equipment, the higher it is the attribute cap value.