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Some items, most notably equipable items, but also charms and jewels, can spawn in different quality levels.
Quest Items: Items used during the various quests the player completes in the game. Potions: They increase Life, Mana, Stamina, provide resistances or can be thrown at monsters. Arrows and Bolts: Ammunition for Bows and Crossbows respectively. Tomes: Used to store scrolls, maximum 20 scrolls per tome. Scrolls: Used to identify items and to open town portals. They can be magical, rare and unique like regular items, and can provide powerful bonuses. Jewels: Similar to gems and runes, jewels are also inserted into socketed weapons.
Charms: When held in your inventory, they can provide you with a bonus. Runes range from very weak to quite powerful, and if inserted correctly, they will yield a runeword. Runes: Like gems, these are inserted into weapons. Starting from the lowest: Chipped Gem, Flawed Gem, Gem, Flawless Gem and Perfect Gem. When inserted, they provide bonuses to the item. Gems: Precious stones that can be inserted into socketed weapons. Apart from weapons and armor which are listed below, there are several other item types the player will come upon. There are many kinds of items in Diablo II.