最終更新日：2025/11/26
The geologist carefully examined the edgarite under a petrographic microscope, noting its hexagonal-trapezohedral habit and the presence of iron, niobium, and sulfur.
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The geologist carefully examined the edgarite under a petrographic microscope, noting its hexagonal-trapezohedral habit and the presence of iron, niobium, and sulfur.
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