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onyx marble

資料來源 : Webster's Revised Unabridged Dictionary (1913)

Onyx \O"nyx\, n. [L., fr. Gr. ? a claw, finger nail, a veined
   gem. See {Nail}, and cf. {Onycha}.] (Min.)
   Chalcedony in parallel layers of different shades of color.
   It is used for making cameos, the figure being cut in one
   layer with the next as a ground.

   {Onyx marble}, a banded variety of marble or calcium
      carbonate resembling onyx. It is obtained from Mexico.

資料來源 : WordNet®

onyx marble
     n : a hard compact kind of calcite [syn: {alabaster}, {oriental
         alabaster}, {Mexican onyx}]
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