

The Rare jewels are uncommon finds, and they can look very shiny, with up to four mods, but you’ll very seldom see one with any mods you really want. See the Jewels Affixes Page for a listing of every possible affix on a jewel, with some commentary about which are the most useful. This will bestow the bonus upon both attacks, rather than just the one weapon in which the jewel has been inserted. An important strategic note for those using attack-upgrading jewels: if you use two weapons at once (Barbarian/Assassin) it is much better to use an attack-upgrading jewel in socketed armor or helms. You can get up to 15% resist all in a helm or armor or weapon from a jewel.

For example, it’s easy to add 19% resist all with a perfect diamond, but that’s only in a shield.

The real benefit of jewels is that they can give their bonus from items that gems and runes don’t. The bonuses you get to mana and hit points and many other things are nice also, but are less than you can get from gems or common Runes. Their best benefits are resistances, Increased Attack Speed, and damage, both physical and elemental. Jewels are often the best thing to socket in an item.
