As requested by @zpnrg1979@lemmy.ca – post pictures of rocks. We will try to identify them.

Note that copy/pasting pictures works in the comment field, assuming you’re on the website. How it works in the multitude of apps – dunno ;)

  • Troy@lemmy.caOPM
    link
    fedilink
    English
    arrow-up
    3
    ·
    1 year ago

    You’re absolutely right that it is copper porphyry ore (from an abandoned historical artisanal mine). However, I don’t have the sample and cannot perform the tests beyond that point. Just wanted to kick-start the thread :)

    • zpnrg1979@lemmy.ca
      link
      fedilink
      English
      arrow-up
      2
      ·
      1 year ago

      I would have called it malachite, maybe it effervesces due to some carbonate in the rock? Whip out your portable XRD!