To socket gems in your gear in Diablo III, you need to find gear with sockets available. Once you have the appropriate gear, open your Inventory, click on the gear piece you want to socket, and then place the gem of your choice into the available socket.
Locating the Mystic
In order to socket gems in your gear in Diablo III, you will need to visit the Mystic. The Mystic is a vendor in the game who offers a range of services, including the ability to enchant items, transmogrify your gear, and yes, socket gems. To find the Mystic, head to Act V of the game and locate her in the town of Westmarch. Once you have found her, you can interact with her to begin the process of socketing gems into your gear.
Gathering Gems
Before you can socket gems into your gear, you will need to have the gems themselves. Gems come in various types and qualities in Diablo III, with each type offering different bonuses to your gear when socketed. To gather gems, you can either find them as loot drops from enemies and chests throughout the game, or you can purchase them from vendors. Keep in mind that rarer and more powerful gems may be harder to come by, so be sure to keep an eye out for them as you progress through the game.
Preparing Your Gear
Once you have acquired the gems you want to socket into your gear, the next step is to prepare your gear for socketing. Not all gear in Diablo III is able to have gems socketed into it, so be sure to check that your gear is eligible for gem sockets. Typically, higher-level gear will have more sockets available for gems, so keep this in mind when choosing which items to socket.
Socketing Gems
When you are ready to socket gems into your gear, speak to the Mystic and select the option to socket gems. This will bring up a menu displaying all of the gear you have that is eligible for socketing. Choose the piece of gear you want to socket gems into, and then select the socket option. You will then be able to choose which gem you want to socket into the item.
Removing Gems
If you ever want to remove a gem from your gear or replace it with a different gem, you can do so by visiting the Mystic again. Select the option to remove gems, choose the piece of gear with the gem you want to remove, and then select the gem you wish to remove. Keep in mind that removing gems can be costly, so be sure to choose wisely before socketing gems into your gear.
Experimenting and Optimizing
Socketing gems into your gear in Diablo III allows you to customize and optimize your character's build to suit your playstyle. Experiment with different combinations of gems to see which ones work best for your character and play style. Whether you are looking to increase your damage output, boost your defenses, or enhance your character's abilities, socketing gems can be a powerful tool in helping you achieve your goals in the game.