Indurite was a material used by the technologically-advanced spacefaring Skorr.
In the mid-21st century, the "Soul of the Skorr" sculpture was made of indurite and contained the thought patterns of the Alar. (TAS: "The Jihad")
According to the Star Fleet Medical Reference Manual, (p. 17) indurite, symbol It, had the atomic weight 322 and atomic number 124. It was first discovered on the Skorr homeworld.