If you've ever were a player in World of Warcraft, then you'll be familiar with the concept of socketed WoTLK Gold pretty quickly. A lot of the pieces of armor you'll see in Outland will have sockets inside the armor, which jewels can be put as we have discussed in the section on Jewelcrafting of the guide.
Combining colored stones with colored sockets may uncover hidden benefits within the item.
Contrary to World of Warcraft, though the jewels you find is color coded, as are all sockets on the items. It is possible to put a gem of any color in the socket that is of any color, so when you come across the blue color of a jewel, and it has an empty socket in red it is fine to put it into. But, the majority of socketable objects come with a grayed-out stat boost. The only method to activate this boost is to make sure that all sockets on the item are paired with jewels of appropriate hues. If, in theory, you came across an item that has three sockets of red, you'll need to locate three red jewels that you can place into the sockets to activate the stat boost that is in the item. It is possible to use any color jewels into the sockets. However, should you choose to use something apart from red gems you'll not be able to unlock the boost in stats. For the majority of items the stat boosts aren't that significant when compared against the default stats as well as the ones you'll get from the jewels.
Be aware that certain jewelry pieces are multi-colored. If you come across a gem that counts as yellow and red it is suitable for an socket of both colors and nevertheless count towards activating the stat boost hidden in the background.
Tip: Items with sockets are able to be brought back from the Outland to buy WoTLK Gold however you won't find any socketed items within Azeroth it self and you won't find any mob jewels in non-expansion zones within the game. The only variation to this rule is Deadwind Pass, between Darkshire and the Swamp of Sorrows; there are high-level creatures here which could be dealt with by any player, even players who don't have Burning Crusade installed. They're unlikely to drop any gemstones or socketed items to these players, though.