A rare mineral, a variety of arsenate, typically found in association with other arsenic minerals.
Named after Friedrich Endlich, a 19th-century mineralogist, with the mineral suffix '-ite' (from Greek 'lithos,' stone). Scientific naming honors those who advance knowledge.
Mineralogists naming rocks after people created an unexpected honor system—discover a new mineral and your name lives in geology forever, which is why geology textbooks read like academic hall-of-fame rolls.
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