GNU Webster's 1913
- n. a banded variety of marble or calcium carbonate resembling onyx. It is obtained from Mexico in various colors ranging from white to deep black.
- n. a hard compact kind of calcite
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From the GNU Webster's 1913:
"n. A massive, compact limestone; a variety of calcite, capable of being polished and used for architectural and ornamental purposes. The color varies from white ...
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