Lastly rock w blk stripes through it

[Traceejean]

Found this at the same creek earlier in the year I love the green the rocks get around here .what causes them to turn green it’s almost like they were dyed or something

 

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[IAMZIM]

In effect it appears that is was dyed, by algae. It looks like a stream tumbled stone that was stained by algae, or that is how it looks to me.

 

[Eu_citzen]

A surface coating could potentially be scraped of, try it!

 

[Traceejean]

Thanks for replying I will scrape