The first known use of adamantine was in the 13th century.

Who invented adamantine?

Adamantium is a virtually indestructible steel alloy named after the fabled metal Adamantine of Greek mythology. The metal has its origins in the work of American metallurgist Dr. Myron MacLain during World War II when the U.S. government assigned him to military research and development.

Is adamantine a real metal?

Adamantine Spar is a real material, but it is not a metal. ... Corundum is a crystalline form of aluminium oxide (Al2O3) typically containing traces of iron , titanium , vanadium and chromium .