This category includes the unique tiers of Sacred items. The Sacred tier of each item has three unique versions that are different from the tiered unique. Sacred uniques can only drop in Destruction difficulty. The best rings, amulets, jewels and quivers are also marked as sacred uniques.
Sockets All unique items come with the maximum allowed number of sockets for the item type.
Oskills If an item has a skill bonus with no character class requirement (eg. +3-6 to Summon Shadows), then the bonus is an 'oskill', giving this skill to any class for free.