from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. a complex silicate mineral of calcium, cerium, thorium, iron, magnesium and titanium

from The Century Dictionary and Cyclopedia

  • n. A rare mineral occurring in massive forms of a velvet-black color.


Sorry, no etymologies found.


  • The placer gravels contain abundant chevkinite, eudialyte, ilmenite, monazite, tscheffkinite, and zircon and minor to trace allanite, cassiterite and thorite.

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