American Heritage® Dictionary of the English Language, Fourth Edition
- n. A glassy pink, green, violet, or blue aluminum borosilicate mineral, Al8BSi3O19OH, used in spark-plug ceramics and as imitation lapis lazuli.
Century Dictionary and Cyclopedia
- n. A silicate of aluminium of a bright-blue color, occurring in fibrous forms in the gneiss of Chaponost near Lyons, and elsewhere.
- Eugene Dumortier (1803-1873), French palaeontologist, + -ite. (Wiktionary)
- French, after Eugène Dumortier, 19th-century French paleontologist. (American Heritage® Dictionary of the English Language, Fourth Edition)
“X-ray diffraction investigation on the fibers yielded figures similarto the mineral dumortierite.”
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List of minerals, elements, group names and geochemistry terms encountered in the science of mineralogy. I've chosen to avoid capital letters in most examples, though a great many mineral names hon...
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