The Diablo 2 Wiki
The Diablo 2 Wiki archive is available for anyone looking for information on Diablo 2. All information here is pre-D2R but contains a lot of useful information that is still relevant. Updated sections for new D2R features can be found on the PureDiablo Diablo 2 section

Ruby

From Diablo 2 Wiki

Rubies in armor or helms provide useful hit point bonuses, and are commonly socketed in merc equipment.


Diablo III Rubies

This gem type returns in Diablo III, but with very different bonuses.


Diablo II: Lord of Destruction

These are the bonuses provided by a Ruby in D2X:

Quality Weapon Helm or Armor Shield Clvl Req
Chipped Ruby-chipped.gif +3-4 Fire Damage +10 to Maximum Life +12% fire resistance 1
Flawed Ruby-flawed.gif +5-8 to Fire Damage +17 to Maximum Life +16% to Fire Resistance 5
Normal Ruby-normal.gif +8-12 to Fire Damage +24 to Maximum Life +22% fire resistance 12
Flawless Ruby-flawless.gif +10-16 to Fire Damage +31 to Maximum Life +28% fire resistance 15
Perfect Ruby-perfect.gif +15-20 Fire Damage +38 to Maximum Life +40% fire resistance 18


D2C Ruby Stats

Rubies have slightly different stats in D2 Classic.


Ruby

Quality Weapon Helm or Armor Shield Sell Price Clvl Req
Chipped Ruby-chipped.gif +3 fire damage +6-8 to maximum life +11% fire resistance 125 1
Flawed Ruby-flawed.gif +4 to fire damage +10 to maximum life +15% to Fire Resistance 375 5
Normal Ruby-normal.gif +4 to fire damage +14 to maximum life +19% fire resistance 1250 12
Flawless Ruby-flawless.gif +5 to fire damage +19 to maximum life +24% fire resistance 3750 15
Perfect Ruby-perfect.gif +6-7, 6-8, or 6-9 fire damage +24 to maximum life +29% fire resistance 7500 18