Stone Trolls are large primitive beasts. While their language is rudimentary one should never dismiss them as 'stupid', when able to draw from their experiences they can be quite cunning.
Males stand between ten and sixteen feet, on average weighing 18500 pounds, far more than a bull African elephant. This is due to the incredible density of their bones, being likened to tempered steel. It makes them very durable but really doesn't add much to their strength, in fact they tire very quickly. It also makes them very slow.
Their skin is thick. Impervious to most blades and standard caliber rounds. It is also fire retardant, but regardless of this, trolls still have a fear of fire and respect it. This is probably due to the fact that they are still sensitive to it's hot sting.
Trolls heal very quickly. They are likened to trees from those attempting to hack them down, but they are NOT impervious.
Troll-kind has scrounged what they need to survive. They are scavengers by nature, picking off the bones of the deserted parts of the world. They are not very many, in comparison to Humans and tend to stay only in small family groups. They rarely congregate in large tribes.
As the sun destroys them, Trolls live underground and come out at night.
Female Trolls are generally smaller, carry more weight on their hips and have thicker tufts of hair on their heads unlike the males being pretty much bald.
Their skin is generally grey but shades of brown or even green-grey exist.
Sunlight. Direct sunlight will instantly turn them to stone, killing them and leaving behind the statute of their corpse. They will crumble away very quickly, lasting no longer than a year's time at most.
Stone Trolls CANNOT swim, they sink like rocks and will drown. They can, however, hold their breath for close to an hour. It is not uncommon for Trolls to sit in rivers or shallow lakes (compared to their size) and await in ambush.
Even after their death the bones of a Stone Troll will still react to sunlight, and very quickly crumble away.
They have average vision and hearing but an exceptional sense of smell, able to track as well, if not better than a bloodhound.