Diamond

Diamonds are among the most useful of gems in the game, very popularly socketed in shields for the resistance bonus.

Diablo III Diamonds

Diamonds are not found in Diablo III. Only Rubies, Topazes, Emeralds, and Amethysts are found in D3C, though other gem types might return in expansions. See the Diablo III wiki for more details.

• Gems in Diablo III.

Diablo II: Lord of Destruction

The following bonuses are provided by socketed Diamonds in D2X.

Quality		Weapon	Helm or Armor	Shield	Clvl Req
Chipped		+28% damage vs. the undead	+20 to Attack Rating	+6% Resistance to All	1
Flawed		+34% damage vs. the undead	+40 to Attack Rating	+8% Resistance to All	5
Normal		+44% damage vs. the undead	+60 to Attack Rating	+11% Resistance to All	12
Flawless		+54% damage vs. the undead	+80 to Attack Rating	+14% Resistance to All	15
Perfect		+68% damage vs. the undead	+100 to Attack Rating	+19% Resistance to All	18

Diablo II Classic Stats

Diamond stats in D2C were slightly lower than they are in the expansion.

Diamond

Quality		Weapon	Helm or Armor	Shield	Sell Price	Clvl Req
Chipped		+28% damage vs. the undead	+10 to Attack Rating	+5% Resistance to All	125	1
Flawed		+34% damage vs. the undead	+15 to Attack Rating	+7% Resistance to All	375	5
Normal		+44% damage vs. the undead	+20 to Attack Rating	+10% Resistance to All	1250	12
Flawless		+54% damage vs. the undead	+25 to Attack Rating	+14% Resistance to All	3750	15
Perfect		+69% damage vs. the undead	+30 to Attack Rating	+19% Resistance to All	7500	18