Definitions
from The Century Dictionary.
- noun In petrography, originally an acid igneous rock more silicious than rhyolite; as now used, in the Lake Superior region, a rock consisting of bands of red chert and hematite.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Min.) A compact siliceous rock resembling jasper.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun mineralogy A
compact siliceous rock resemblingjasper .
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