Stone Dragons have a tough outer covering made of a stone-like material. They eat rocks, using the minerals they contain for nourishment and to keep up their stone outer shell. They rarely move, and are the heaviest of all types of dragons. Although they have wings, indicating flight ability, no one has ever seen a stone dragon flying.

Dragons are highly-intelligent reptilian creatures that—from a human perspective, at least—appear to live forever. Many different varieties of dragon exist, each with their own unique qualities, habitats, and behavior. Adolescence in dragons is usually marked by the growth of a hatchling’s wings, although not all breeds of dragons grow wings and some breeds have other traits that indicate the beginning of maturation. In Galsreim, dragons and humans coexist peacefully.

"Dragon of Igneous Rock" he was called, for his exoskeleton was of a different kind of stone than most others; it was igneous rock.

This is only speculation, but it's not unlikely that this lineage of stone dragons goes back to an ancient breed of early fire dragons. Continuously enclosed near the deep magma chambers of the earth, they lived in a harsh environment that required constant adaptation. Once freed of their enclosure, their tough hide crystallized and hardened, making their nature closer and closer to that of a stone dragon throughout the ages...

True or not, one thing stands for sure; the fire still burns in the eyes of this stone dragon!