Adamantortoise is an enemy in Final Fantasy XIII. It is also a mark in Mission 63. Adamantortoise is essentially an easier version of Adamantoise with less HP and lower stagger point, but with the same item drops. They also have a notably higher resilience to debuffs than the Adamantoise, but can be defeated using the same strategy.
Adamantortoises can be found chained to the ground in the passageways to Eastern Tors valley. One is accompanied by three Gorgonopsids. Adamantortoises have broken tusks and their shells are smoother than their stronger counterparts. Damage becomes halved during stagger and it is susceptible to Slow, Deprotect, Deshell, Imperil, Curse, and Daze.
Adamantite and similar words including Adamant and Adamantine are used to refer to any especially hard substance, whether composed of diamond, some other gemstone, or some type of metal.