Octiron, Ofe, is an e-block metal which exists only in magical fields exceeding 0.01 millithaum.  It is known to be hard and dense, but these properties have not yet been quantified.  An attempt by Smith and Weatherwax to measure its melting point succeeded only in proving that current technology is incapable of melting it(1). It is known to be capable of emitting anti-sound when struck(2), and of confining magical fields(3).

There has been speculation that a second allotrope exists, which resembles gold but which retains alpha-octiron's hardness, high melting point, and magic-confining ability(4). This possibility has not been confirmed.


  1. "Equal Rites"; E. Smith and E. Weatherwax; Unseen University Press.
  2. Ankh-Morpork Times, evening edition, 02-19-1368.
  3. "Moving Pictures"; T. Librarian, V. Tugelbend, and T. Pratchett; Unseen University Press.
  4. "Return of the King"; D.L. Sauron, F. Baggins, and S. Gamgee; Oxford University Press.