Difference between revisions of "Black calcite"
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A naturally occurring black-color [[calcite]] ore. The dark color of black calcite is used to [[manganese oxide]] impurities. Black calcite ore also contains silver deposits for which it is mined (Brady 1971). It is not the same as black chalk. | A naturally occurring black-color [[calcite]] ore. The dark color of black calcite is used to [[manganese oxide]] impurities. Black calcite ore also contains silver deposits for which it is mined (Brady 1971). It is not the same as black chalk. | ||
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== Sources Checked for Data in Record == | == Sources Checked for Data in Record == | ||
Revision as of 17:23, 20 May 2020
Description
A naturally occurring black-color Calcite ore. The dark color of black calcite is used to Manganese oxide impurities. Black calcite ore also contains silver deposits for which it is mined (Brady 1971). It is not the same as black chalk.
Sources Checked for Data in Record
- G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 131