Question about Gems and their damage modifiers in weapons

[Prophanity]

Hello, i just started playing D2: LOD after seeing that there is going to be a D3 coming out. i play a lvl 20 Barb. I duel wield and plan to spec to whirlwind once I hit lvl 30.

I have a quick and most likely obvious question about gems and how when put into a socketed weapon what they do to the damage.

Say i put a chipped ruby that when put into a weapon gives 3-5 fire damage. How does that affect the damage that the sword does? Does it just give me a chance to do that additional fire damage? Or is that fire damage added to the low and high damage of the weapon?

Any advice that you could give on this subject or just in general would be much appreciated, thank you for your time.

[Hrus]

The damage of your weapon is physical. This physical damage is multiplied by enhanced damage from your skill, off-weapon enhanced damage (like from fortitude) and Strength (usually - for melee weapons, for ranged weapons it's DEX). Anything which reads : "adds fire damage" is only added to your final weapon damage.

Say you have "add 20-40 fire damage" from charms and rubies in your weapon in total.
Your weapon does 50-100 damage. You have might aura +180% damage and 120 strength (adding 120% damage)

your final damage is (50-100)*(1+1.8+1.2)=150-300 physical damage and 20-40 fire damage.

The character screen will show 170-340 damage, but the types of damage are separate and applied to monster resistances separatly.

[ThomasJohnsen]

Say i put a chipped ruby that when put into a weapon gives 3-5 fire damage. How does that affect the damage that the sword does? Does it just give me a chance to do that additional fire damage? Or is that fire damage added to the low and high damage of the weapon?

It gives you (a 100% chance, if you prefer, to deal) an additional 3-5 fire damage. This is applied seperately and isn't affected by enhanced damage or strength modifiers.

#EDIT: pwnd