Like all the other Gems, Topazes grant bonuses that are related to their color. The yellow in Topaz signifies the Elemental power of Lightning. In Weapons and Shields, it adds bonuses related to Lightning, while in Armor and Helms, it adds an increase in Magic Find, a trait also signified by the golden glow of yellow, indicating Prosperity.
Gem
Level
Weapons
Shield
Helms/Body Armor
Chipped
1
1-8 Lightning Damage
12% Resist Lightning
+9% Chance to Find Magic Items
Flawed
5
1-14 Lightning Damage
16% Resist Lightning
+13% Chance to Find Magic Items
Normal
12
1-22 Lightning Damage
22% Resist Lightning
+16% Chance to Find Magic Items
Flawless
15
1-30 Lightning Damage
28% Resist Lightning
+20% Chance to Find Magic Items
Perfect
18
1-40 Lightning Damage
40% Resist Lightning
+24% Chance to Find Magic Items
Diablo III
Gem
Helm
Weapon
Other
Regular
3.5% Reduced Resource Costs of Skills
+30 Thorns damage
+10 Intelligence
Flawless
5.0% Reduced Resource Costs of Skills
+100 Thorns damage
+20 Intelligence
Square
6.5% Reduced Resource Costs of Skills
+300 Thorns damage
+30 Intelligence
Flawless Square
8.0% Reduced Resource Costs of Skills
+600 Thorns damage
+40 Intelligence
Star
10.0% Reduced Resource Costs of Skills
+1800 Thorns damage
+58 Intelligence
Marquise
10.5% Reduced Resource Costs of Skills
+4000 Thorns damage
+62 Intelligence
Imperial
11.0% Reduced Resource Costs of Skills
+8000 Thorns damage
+100 Intelligence
Flawless Imperial
11.5% Reduced Resource Costs of Skills
+14000 Thorns damage
+160 Intelligence
Royal
12.0% Reduced Resource Costs of Skills
+26000 Thorns damage
+220 Intelligence
Flawless Royal
12.5% Reduced Resource Costs of Skills
+38000 Thorns damage
+280 Intelligence
Development
This page contains obsolete content This article contains information that is no longer relevant to gameplay, but is kept here for informational purposes.
Prior to 2.4.2, socketing a Topaz into Helms would increase the Magic Find instead of reducing resource costs, up to 41% for Flawless Royal.
Prior to patch 2.3, Topaz gems in Diablo III had many more tiers, but were condensed for easier crafting.