Definitions
from The Century Dictionary.
- noun A name given to a cryptocrystalline mixture of aragonite, with calcite in a condition resembling chalk, and some organic matter.
Etymologies
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Examples
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Finely scaly varieties with a pearly lustre are known as argentine and aphrite (German _Schaumspath_); soft, earthy and dull white varieties as agaric mineral, rock-milk, rock-meal, &c. -- these form a transition to marls, chalk, &c.
Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 "Bulgaria" to "Calgary" Various
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