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What are these green and black layered rocks?

0 votes

This is relating to my previous question (http://answers.minerals.net/7749/update-previous-question-rinsed-more-colorful-rocks-shown), I am uploading closer pictures while grouping ones I assume are the same type of rock. This one intrigues me because of the multiple layers of black and green. I Googled it and still couldn't find anything close.

For the record, in the last two collage images: as written the left column was taken when the rock was dry and the right column is the rock wet. I want to add that the top row had the flash on and the bottom row did not.

asked Aug 13, 2016 by JohnBagel (1,010 points)

1 Answer

0 votes
Without knowing any physical properties or its mode of occurrence its really impossible to identify this one visually. Can you please give any locality information and/or describe the surrounding rock? Can you supply any physical properties?
answered Sep 18, 2016 by hershel (46,480 points)
All I know is that it (allegedly) came from Brazil, as part of a bulk order from Amazon. I can try to do a scrape and hardness test and let you know.
Ok. Also see if you can somehow test for fluorescence.
I will try to obtain a UV light to test with and see if it glows.

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