Topazes are gems, socketable items. They are yellow.

Diablo IIEdit

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 IIIEdit

Gem	Helm	Weapon	Other
Chipped	5% Better Chance of Finding Magical Items	Melee attackers take 2 damage per hit	+6 Intelligence
Flawed	7% Better Chance of Finding Magical Items	Melee attackers take 3 damage per hit	+10 Intelligence
Regular	9% Better Chance of Finding Magical Items	Melee attackers take 6 damage per hit	+14 Intelligence
Flawless	11% Better Chance of Finding Magical Items	Melee attackers take 10 damage per hit	+18 Intelligence
Perfect	13% Better Chance of Finding Magical Items	Melee attackers take 15 damage per hit	+22 Intelligence
Radiant	15% Better Chance of Finding Magical Items	Melee attackers take 30 damage per hit	+26 Intelligence
Square	17% Better Chance of Finding Magical Items	Melee attackers take 50 damage per hit	+30 Intelligence
Flawless Square	19% Better Chance of Finding Magical Items	Melee attackers take 100 damage per hit	+34 Intelligence
Perfect Square	21% Better Chance of Finding Magical Items	Melee attackers take 200 damage per hit	+38 Intelligence
Radiant Square	23% Better Chance of Finding Magical Items	Melee attackers take 350 damage per hit	+42 Intelligence
Star	25% Better Chance of Finding Magical Items	Melee attackers take 600 damage per hit	+46 Intelligence
Flawless Star	27% Better Chance of Finding Magical Items	Melee attackers take 900 damage per hit	+50 Intelligence
Perfect Star	29% Better Chance of Finding Magical Items	Melee attackers take 1250 damage per hit	+54 Intelligence
Radiant Star	31% Better Chance of Finding Magical Items	Melee attackers take 1800 damage per hit	+58 Intelligence
Marquise	33% Better Chance of Finding Magical Items	Melee attackers take 2500 damage per hit	+62 Intelligence

Gems
Diablo II — Amethyst • Diamond • Emerald • Ruby • Sapphire • Topaz • Skull Diablo III — Amethyst • Emerald • Ruby • Topaz