One of the mysteries of the English language finally explained.
A mineral consisting of hydrated aluminium oxide (subsequently identified with diaspore).
Late 19th century; earliest use found in American Journal of Science. From French empholite from Hellenistic Greek ἐμϕωλεύειν to lurk in + French -ite; so called on account of the difficulty of spotting the mineral because of its small size and its colour, similar to that of the surrounding rock.
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