Difference between pages "File:SC28609.jpg" and "Black calcite"

Latest revision as of 08:11, 8 May 2022

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.

Resources and Citations

G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 131

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Bitumen

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Horizontal resolution	72 dpi
Vertical resolution	72 dpi
Y and C positioning	Centered
Meaning of each component	Y Cb Cr does not exist
Color space	Uncalibrated

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+== 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.
+==Resources and Citations==
+* G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971  Comment: p. 131
+[[Category:Materials database]]