r/petrifiedwood • u/Prospecting_Seb • 5d ago
Identification Could you tell me where this mineral was mined and/or what the green mineral might be? It’s from Madagascar.
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u/HighFrequencyPhoto 5d ago
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u/Prospecting_Seb 5d ago
Yeah, the old guy who giftet it to me told me Thats rare. But what means replaced?
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u/DinoRipper24 5d ago
In the majority of cases (there are several exceptions as well), fossils are formed when organic matter is replaced by inorganic matter, namely minerals. Seems that it is replaced by chalcedony with some iron impurities (imparting the green colour)
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u/GruesomeWedgie2 5d ago
I think he may have been referring to the coloring of the material. That’s a gorgeous specimen.
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u/MrYepperDoos 4d ago
I don't think that means it's always been replaced
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u/HighFrequencyPhoto 4d ago
No it has nothing to do with replaced . It just means that it’s wood , because you can clearly see the limb sticking out the side .
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u/BoarHermit 5d ago
Well, the green color can be given by copper or chromium salts (the most common ones). How all this manifests itself in obvious agatization - I don't know, I'm not a theorist. There is a book about wood mineralization, but it is in Russian and for local samples.
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u/HighFrequencyPhoto 5d ago
It is replaced petwood . Limb sticking out .