Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A glassy pink, green, violet, or blue aluminum borosilicate mineral, Al8BSi3O19OH, used in spark-plug ceramics and as imitation lapis lazuli.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A fibrous aluminium boro-silicate mineral that occurs in various colours.

from The 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.

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

French, after Eugène Dumortier, 19th-century French paleontologist.

from Wiktionary, Creative Commons Attribution/Share-Alike License

Eugene Dumortier (1803-1873), French palaeontologist, +‎ -ite.

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