Difference between revisions of "Black calcite"
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Revision as of 06:58, 24 July 2013
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.
Additional Information
G.S.Brady, Materials Handbook, 10th edition, McGraw-Hill, New York, 1971.
Authority
- G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 131