Stone giants, called steinjotunen in their own language, were a reclusive and artistic race of giants that lived in underground and mountainous environments. The bodies of stone giants had a gray to grayish-brown skin tone, hair that ranged in a spectrum of dark grays and bluish-grays, and eyes of a silver or steel hue. They also tended to wear clothing that was of a similar color to nearby rocks, which altogether made it easy for their race to blend in with their environment when needed. Adults averaged about 18 feet (5.5 meters) in height, although fossilized stone giants from the 2nd era show that in the past their race was capable of reaching heights of up to 24 feet (7.3 meters).[ Though thinner and less bulky than fire giants, who were about the same height on average, a stone giant's thicker, heavier flesh made them weigh significantly more, at about 9,000 pounds (4,100 kilograms).