from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A rare zeolite, a hydrated barium silicate that forms vitreous white monoclinic crystals.

from the GNU version of the Collaborative International Dictionary of English

  • n. A hydrous silicate of alumina and baryta, occurring usually in white cruciform crystals; cross-stone.

from The Century Dictionary and Cyclopedia

  • n. A mineral belonging to the zeolite group, commonly occurring in cruciform twin crystals which vary in color from white to yellow, red, or brown. It is a hydrous silicate of aluminium and barium. Sometimes called cross-stone and andreolite.


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