Diablo 4: The best gemstones for each class

• Weapons: The best for weapon sockets are emeralds. They provide you with a bonus on critical damage against injured enemies. Most Barbarian builds are based on this effect, therefore the bonus is worth it.
• Armor: This depends on the defense you need. Most Barbarian builds require toughness, which is why the sapphire is usually the best choice. If you need more maximum health, rubies can also be worthwhile.
• Jewelry: Since the resistance to all damage types does not work well in World Tier 3 and 4 anymore, the skull is the right choice and increases your armor in a jewelry socket.

You can find a good Barbarian build here:

Diablo 4: Barbarian Build with Whirlwind – All Skills and Aspects in German

• Weapons: No matter which build you use for the Druid, in most cases topaz is the best choice. This gives you higher damage on your basic skills with which you regenerate your spirit.
• Armor: Toughness is extremely important for the Druid just as it is for the Barbarian. Consequently, the sapphire is the right choice in most builds.
• Jewelry: Again, armor is the best value for defense. Hence, the skull is usually worthwhile.

You can find a good Druid build here:

Diablo 4: Druid Build with Trample – All Skills and Aspects in German

• Weapons: In many of the necromancer builds that do not rely on pets, the increased critical damage against injured enemies from emeralds is worthwhile.
• Armor: If you have pets, an emerald is worthwhile, as it also gives thorns damage to your pets in the right build. Otherwise, a ruby can be useful since the bonus to maximum health helps you live longer.
• Jewelry: Again, the skull is the best choice. Armor is generally better than resistances against all damage types, especially in World Tier 3 and 4.

You can find a good necromancer build here:

Diablo 4: Necromancer Build with Bone Spear – The Best Build & Skill

• Weapons: Topaz enhances the basic skills of the hunter and helps when you need combo points. If you play more with the traps, an amethyst is also worthwhile in the weapon socket.
• Armor: Because hunters move a lot and are squishy, a ruby for increased maximum health is worthwhile here. If you have problems with enemy CC, an topaz in armor sockets is also beneficial.
• Jewelry: Like with the other classes, here you would most likely take the skull, as armor is currently the best value for defense.

You can find a good hunter build here:

Diablo 4: Hunter Build with Blade Storm – How to Slash Everything in Melee at Endgame

• Weapons: If you have a build with a lot of CC in your repertoire, sapphires are worthwhile. This increases your damage against enemies under control loss effects. Amethysts are beneficial if you deal a lot of damage over time.
• Armor: Due to the low defense that the wizard brings in exchange for high damage, the diamond is worthwhile here. This increases your barrier generation.
• Jewelry: Due to the boost for armor, the skull is the best choice for the jewelry socket.

You can find a good build for the wizard here:

Diablo 4: Endgame Fire Build for Wizard – Skill & Paragon in German