from The Century Dictionary.
- noun A precious and richly veined mineral much used in ancient art; the hard Oriental alabaster. See
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Oriental alabaster, the alabastrites of the classical writers, is a translucent marble (calcium carbonate) obtained from stalagmitic deposits; because of its usually banded structure, which gives it some resemblance to onyx, it is also called onyx marble, or simply, though incorrectly, onyx.