Red Chalk or Loess

Chalcopyrite in Red Chalk?

This is the third of the three I removed from the batch.  It has something embedded in it which I think might be Chalcopyrite.  The surrounding material is about like chalk though it might be just slightly more course.

Loess?

  You can see that it was in the same bag with the chalk.  I did not notice the white dust until later.  I meant to re-shoot it but did not get it done.  Again, Anyone knowing better than I would be welcome to comment.

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