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Named after the German chemist Georg Ludwig Ulex (1811-1883) + -ite.
Etymology from Wiktionary, CC BY-SA 4.0.
ulexite
Today it means: A white mineral with triclinic crystals, NaCaB₅O₉·8H₂O, noted for its fibers which transmit light by internal reflection, such that a piece with flat faces perpendicular to the fibers' orientation displays an image of whatever is adjacent to its other side. Full definition →