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Adamant in classical mythology is an archaic form of diamond. In fact, the English word diamond is ultimately derived from adamas, via Late Latindiamas and Old Frenchdiamant. In ancient Greek ἀδάμας (adamas), genitive ἀδάμαντος (adamantos), literally "unconquerable, untameable". In those days, the qualities of hard metal (probably steel) were attributed to it, and it "adamant" became as a result an independent concept.
In the Middle Ages adamant also became confused with the magnetic rock lodestone, and a folk etymology connected it with the Latin adamare, "to love or be attached to". Another connection was the belief that adamant (the diamond definition) could block the effects of a magnet. This was addressed in chapter III of Pseudodoxia Epidemica, for instance.
Since the contemporary word diamond is now used for the hardest gemstone, the increasingly archaic term "adamant" has been reduced to mostly poetic or anachronistic use. In that capacity, the name, and various derivatives of it, are frequently used in modern media to refer to a variety of fictional substances.
In the Bible, God told the prophet Ezekiel to speak His word to the Israelites. But God warned him that they would not listen because they are impudent and hardhearted. However, God said to Ezekiel "As an adamant harder than flint have I made thy forehead: fear them not, neither be dismayed at their looks, though they be a rebellious house."Link label
In Virgil's Aeneid, the gate of Tartarus is framed with pillars of solid adamant, "that no might of man, nay, not even the sons of heaven, could uproot in war"
In John Milton's epic poem Paradise Lost, adamant or adamantine is mentioned eight times. First in Book 1, Satan is hurled "to bottomless perdition, there to dwell in adamantine chains and penal fire" (lines 47–48). Three times in Book 2 the gates of hell are described as being made of adamantine (lines 436, 646 and 853). In Book 6, Satan "Came towring [sic], armd [sic] in Adamant and Gold" (line 110), his shield is described as "of tenfold adamant" (line 255), and the armor worn by the fallen angels is described as "adamantine" (line 542). Finally in book 10 the metaphorical "Pinns [sic] of Adamant and Chains" (lines 318–319) bind the world to Satan, and thus to sin and death
In the 1956 movie Forbidden Planet, Dr. Morbius describes the Krell towers as being made of "glass and porcelain and adamantine steel."
In Marvel Comics, adamantium (first appearance: Avengers #66, July 1969) is a nearly indestructible metal that coats the skeleton of the superhero Wolverine and makes up the body of the supervillain Ultron.
In the tabletop roleplaying game Dungeons and Dragons, Adamantine is an extremely hard exotic metal. Adamantine weapons can easily deal damage to golems and tough inanimate objects.
In the action role-playing game Dragon Age: Inquisition, Adamant Fortress is the name of an ancient Grey Warden keep besieged by the player's forces.
In the manga and anime series Inuyasha, one of the titular character's special moves is known as "Kongōsōha" (金剛槍破), translated into English as "Adamant Barrage". It is unleashed through Inuyasha's sword Tessaiga and spurts out thousands of tough diamond shards at the target. The use of the word "Adamant" in the English translation might be due to the show's setting being set in the Warring States Period of Japan, alluding towards the ancient name of "diamond".
^Webster's dictionary definition of adamant Archived June 20, 2010, at the Wayback Machine, 1828 and 1913 editions
^Hesiod; Richard S. Calwell (1987). Hesiod's Theogony. Cambridge, Ma: Focus Information Group. pp. 37–38 at lines 161–181. ISBN 9780941051002. Quick she [Gaia] made the element of grey adamant, made a great sickle...
^Virgil, Eclogues. Georgics. Aeneid: Books 1-6, trans. H. Rushton Fairclough, rev. G. P. Goold, Loeb Classical Library 63 (Cambridge, MA: Harvard University Press, 1916), p. 571.
^John Milton, Paradise Lost, Book one, two, six, and ten (1667). (see text from Project Gutenberg)
^The Hypostasis of the Archons. (Translated by Bentley Laton and the Coptic Gnostic Library Project )
^Bang, Mary Jo. "Bang's Purgatorio". The New Yorker.