7b23a9de_Item_Rarity___Dead_Island_Wiki__Description
[Rarity] Rare blue text [Reward] Yes [Chests (weapons)] Metal/Locked chests Low [Looted (items)] No [Dropped (zombie)] Yes Low [Description] 
Often given as a reward from quests but can be found on corpses and uncommonly in metal chests.
Item Rarity - Dead Island Wiki