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Identity HelpEastern desert Egypt

21st Aug 2022 18:15 UTCEslam El sharkawy

08622400017111831512891.jpg
i need more information about black calcite


Questions Answered
Can it scratch glass? : Yes
Can you scratch it with your fingernail? : No
Is it light/heavy for the size? : Heavy

23rd Aug 2022 17:39 UTCEslam El sharkawy

thanks for that, but could you please to give me an example to ask about the black minerals associated with calcite and made it black

23rd Aug 2022 21:31 UTCHerwig Pelckmans

Black calcite is most likely due to impurities of manganese, or eventually organic matter, or inclusions of black clay-like particles...

Cheers, Herwig
 
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