The Jeweler deals in precious jewelry; namely amulets, rings, and gems. The Jeweler will provide the player with special services involving gems. He is the second of the two encountered Artisans, and first offers his services during Act II, when sockets and gems first becomes available. The Jeweler's wagon boasts an especially ornate look, as his jewels are more difficult to display than the other Artisans' goods.
- Combine Gems: Three gems of equal quality can be combined into one gem of a higher quality. There are 14 quality levels of gems in Diablo III, and only the lowest eight will be dropped from monsters. Therefore, it is up to the Jeweler to combine these gems to provide the player with the highest quality gems.
- Remove Gems: Should the player wish to remove gems already socketed into items, the Jeweler can do this without either destroying the item or the gem, allowing the player to not only reuse gems, but to upgrade the gems socketed in their items as well.
During development it was advertised that the jeweler would also be able to add sockets to item. This feature has since been removed, and as of patch 1.01 does not exist in the game.
 Combine Gems
The only abilities affected by levelups are his gem upgrade services. At Apprentice level he starts out with only the ability to upgrade chipped gems to flawed level, and each subsequent upgrade allows him to upgrade gems one additional step. At Exalted level he gains the ability to create Star quality gems. In order to learn how to combine gems into Flawless Star, Perfect Star and Radiant Star quality, the Jeweler requires specific Designs.
In order to upgrade gems, it is required to provide the Jeweler with 3 gems of lesser quality, a small amount of gold and starting with tier 4 gems also specific Pages of Training.
The table below shows the exact costs of upgrading each gems along with the required Jeweler level and way of recipe acquisition.
 Remove Gems
The gem removal service has been implemented in order to encourage the usage of lower level gems, while still having an aim of obtaining tier 14 gems. Thanks to the mechanic that allows to receive both the gem and the socketed item it is possible to use without any consequences of loss low tier gems from the start of the adventure.
The gem removal service also serves as a Gold Sink, since upon finding better equipment players might want to re-socket their gems from previously used gear or change the type of gems used depending on the player needs.
 Upgrade Costs
The Jeweler, unlike the Blacksmith, requires only 1 training per level in order to level up, since the amount of recipes he can learn is greatly smaller. The upgrade costs of this Artisan are also less costly.
Apart from gold, the Jeweler requires Jeweler-specific Pages of Training, such as Page of Jewelcrafting and Tome of Jewelcrafting in order to advance, with the exception of levels 8-10, when the Jeweler requires Tome of Secrets, which are also required by the Blacksmith to train at higher levels.
|Level||Title||Gold||Pages of Training||Difficulty|
|4||Master||10,000||10 Page of Jewelcrafting||Normal|
|5||Grandmaster||10,000||10 Page of Jewelcrafting||Nightmare|
|6||Illustrious||10,000||10 Tome of Jewelcrafting||Nightmare|
|7||Magnificent||10,000||10 Tome of Jewelcrafting||Hell|
|8||Resplendent||20,000||10 Tome of Secrets||Hell|
|9||Glorious||30,000||10 Tome of Secrets||Inferno|
|10||Exalted||40,000||20 Tome of Secrets||Inferno|
|Total||140,000|| 20 Page of Jewelcrafting
20 Tome of Jewelcrafting
40 Tome of Secrets