from The Century Dictionary.

  • noun A mineral often occurring in embedded grains of a yellow to red color, and also in perfect crystals.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Min.) A fluosilicate of magnesia and iron, yellow to red in color, often occurring in granular form in a crystalline limestone.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun mineralogy A nesosilicate mineral with chemical formula (Mg,Fe)5(F,OH)2(SiO4)2, the most frequently encountered member of the humite group.


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