Definitions

from The Century Dictionary.

  • noun A fluo-arsenate of aluminium, iron, and sodium, occurring in orange-red monoclinic crystals, associated with cassiterite (tin-stone), at Durango, Mexico.

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

  • noun A rare sodium aluminium arsenate fluoride gem with brittle crystals, chemical formula NaAl(AsO4)F.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

Named after Durango, a region in Mexico which is the main source of the gems.

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