Use "justificative" in a sentence

1. On the occasion when the fires under the first set of retorts in their shed had glowed far into the night she did not retire to rest on the rough cadre set up for her in the as yet bare frame-house till she had seen the first spongy lump of silver yielded to the hazards of the world by the dark depths of the Gould Concession; she had laid her unmercenary hands, with an eagerness that made them tremble, upon the first silver ingot turned out still warm from the mould; and by her imaginative estimate of its power she endowed that lump of metal with a justificative conception, as though it were not a mere fact, but something far-reaching and impalpable, like the true expression of an emotion or the emergence of a principle