"Of the great shelled titantoises, the strain with the shell of the hardest metal is the adamantitan. The naturally-occurring adamantite that forms its shell cannot be manufacted, making the creature famous among metalworkers. They are remarkable for the slowness of their growth, requiring several thousands of years to reach maturity."
"Before the advent of alloys made by Man, adamantite was for many years the strongest metal known. Even today its quality and strength are peerless, save for a handful of rare alloys. That is why they tell of the fool who swallowed a shard of adamantite, only to have it cut its way out of his belly. A salutary tale, to be sure!"