Adding sockets to a non-socketed item can be obtained in two ways - Cube Recipes or via Larzuk Quest

Cube Recipes

You can take a look at the recipes on the left for adding sockets to your items. You should keep the following in mind:

• You can add sockets to white or ethereal items which are NOT Superior!
• The number of sockets is determined by a random roll of a dice (a random value from 1 to 6). The result will be either the value of the roll or the maximum number of sockets the item can have.
  For example, a Monarch shield, can have a maximum of 4 sockets. Rolling 1-3 will give you 1-3 sockets respectively. Rolling 4-6 will equate to 4 sockets as this is the maximum for the item.
• When removing the runes/gems/jewels in a socketed item with the last recipe, the runes/gems/jewels will NOT be returned to you.

Larzuk quest

• For white or ethereal items this will add the maximum number of sockets in accordance with the item level.
• For magical items you can obtain 1 or 2 sockets with 50/50 chance.
• For rare, set or unique items, the quest will always yield 1 socket