What do Gem Skills buff?

[Gentle Dementia]

I'm very new to this series, but I'm enjoying this game immensely. I just had a quick question regarding the skills that buff gems.
Lets say I have the 'Poison' skill leveled until it increases the 'Gem component power' by 100%.
Does this increase the gem's raw damage by 100%, the poison special effect by 100%, or both?
Additionally, does this increase the raw damage of a mixed gem with a poison component in it by 100%? Or by the ratio of the gem's? E.g. a dual gem would get a 50% boost, a triple gem a 33% boost, etc.
Thanks in advance for any help you could offer.

[Cinth]

Just the special.

[Gentle Dementia]

Originally posted by Cinth:

Just the special.

Makes sense, thanks for the answer.

[Cinth]

NP.

[BilboCGL]

The gems skills increase the special power of the according gem. To stay at your example, raising the posion skill will result in a raise of the "poison damage" a green gem does (when you are new to this series, poison ignores armor! At low level very useful)
There are some other ways to increase the gems raw damage: True color and resonance skills increase the damage, when you meet the *bound gems, (white and black) you will see that these gems, especially when used with orange or yellow (and a part of red) will result in powerful fighting machines... :)
For the beginning, take a look at the basic guide by xande!