In Diablo II there are two types of rare items: Uniques and Rares. Each one has its own unique set of properties and can be found in a variety of ways, but the difference between them is mainly that Uniques are a lot more powerful than Rares. Unique Items stand out by their green item name and have legendary magical abilities. They are not easy to find though, so be sure to look them over...
English 
Arabic
French
Spanish
Portuguese
Deutsch
Turkish
Dutch
Italiano
Russian
Romaian
Portuguese (Brazil)
Greek