I am trying to figure out what kind of material 
is made out of or if there is a real world comparison, so i can compare his height and mass to that of new 
. Does anyone know of any place where Rioters have said what makes up or if he compares to a real world material?
EDIT: I mean what kind of rock specifically?
When he is brown, like in his splash art, he has a coating of granite on him. I know that because his passive is called "Granite Shield".
When that falls off he is a brown rock that looks like it is melted. Looking at different volcanic rocks, he kinda looks like this red basalt. http://earth2geologists.net/grandmanangeology/MineralPhotos/volcanic_redmud.JPG
Basalt turns red when it is exposed to air and water for a long time. It is naturally brown or black.
EDIT: There are some brown granites too and it is a volcanic rock as well, so he could be made out of that all the way through and his shell is just that cooling.
He is from a distant realm.
I would assume that his makeup is not classifiable by our science or that of Runeterra. We may be able to make some guesses based on the properties of the rock that we can see in the game, which is not much.
I may be an aspiring Geologist, but I don't know enough now to make a guess.
i think he is made of solid rock...
he even says so in game
Probably multiple different types of stone or whatever makes up mountains (I don't know if mountains are normally the same type or rock or multiple types. Probably both).
stone
Well his passive is called Granite Shield, so that might give an idea.
I think that he is made of different minerals, just like a mountain.
... or maybe he is made of a pile of pixels.
