Hercynite is a spinel mineral with the formula FeAl2O4.
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Hercynite is a spinel mineral with the formula FeAl2O4.
It occurs in high-grade metamorphosed iron-rich argillaceous (clay-containing) sediments as well as in mafic and ultramafic igneous rocks. Due to its hardness it also is found in placers.
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).