Each armor is categorized by a certain level of rarity. You can see the complete list of these below.
Common armor:
This is indicated by 1 Bronze Star. It has a maximum level of 30.
Uncommon armor:
This is indicated by 1 Silver Star. It has a maximum level of 30.
Rare armor:
This is indicated by 1 Gold Star. It has a maximum level of 50.
Super Rare armor:
This is indicated by 2 Gold Stars. It has a maximum level of 50.
Ultra Rare armor:
This is indicated by 3 Gold Stars. It has a maximum level of 70.
Legendary armor:
This is indicated by 4 Gold Stars. It has a maximum level of 70.
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