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(), 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. スポンサード リンク
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