Cryptomelane : K(Mn4+7Mn3+)O16
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Photo added to mindat.org
“Black Cryptomelane in a quartz vug.
Point of view #1.
20mm macro lens on bellows. CZP.”
Jean-Paul Berthe - 26th May 2017
Photo added to mindat.org
“Black Cryptomelane in a quartz vug.
Point of view #2
20mm macro lens on bellows. CZP.”
Jean-Paul Berthe - 26th May 2017
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