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adamantine spar

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adamantine spar

[‚ad·ə′man‚tēn ′spär]
(mineralogy)
A silky brown variety of corundum.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in classic literature
And the king, when he is highest provoked, and most determined to press a city to rubbish, orders the island to descend with great gentleness, out of a pretence of tenderness to his people, but, indeed, for fear of breaking the adamantine bottom; in which case, it is the opinion of all their philosophers, that the loadstone could no longer hold it up, and the whole mass would fall to the ground.
The wave of rebellion swept over me in an instant, beginning with an heretical doubt as to the sanctity of the established order of things--that fetish which has ruled Pan-Americans for two centuries, and which is based upon a blind faith in the infallibility of the prescience of the long-dead framers of the articles of Pan-American federation--and ending in an adamantine determination to defend my honor and my life to the last ditch against the blind and senseless regulation which assumed the synonymity of misfortune and treason.
Fyne herself, who had come to the table armed with adamantine resolution.
This devotion deeply moved her - and the adamantine face lost the stern rigidity of its terror.
Spenlow came in, and then described what had passed; giving him to understand that I was not hopeless of his being able to soften the adamantine jorkins, if he would undertake the task.
Then there is the Odinga family, most famous as the adamantine hard core of principled opposition through four presidential regimes.
After all, despite his previous adamantine stance, he has caved in to their demands that increases in the duty on diesel and petrol be reversed; he has offered them talks, though with his prime minister Edouard Philippe rather than himself, a move that may presage a certain amount of scapegoating.
However, Olusoga's comforting thought runs counter to the British establishment's own adamantine but honest refusal, despite official criticism of the word as "anachronistic" and "insensitive", to substitute "empire" in these titles with something less divisive and racially charged.
Outgoing Oklahoma State Secretary of Energy and Environment Michael Teague will join Denver-based Adamantine Energy as strategic advisor on Feb.
The Spy and the Traitor, however, is in no doubt that Gordievsky was serving a cause that was just and correct with "an adamantine, unshakable conviction that what he was doing was unequivocally right".
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