Lastly, others are oblong, and appear to me to be the Adamas hexadrus tabellatus of Wallerius.
Later Roman authors mentioned various rivers in India as yielding the Adamas among their sands.
The name Diamond comes from the Greek adamas, which means unconquerable.
The alleged magical powers of the magnet are recited in Caput I., Adamas.
But it seems to be less known that adamas also at first denoted steel.
