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I received the below piece as a gift with some petrified wood that I purchased from Indonesia. I’ve included some close-up pictures from my microscope. I’m not really sure if this is a piece of petr ...

Orange is probably goethite too, and brown is probably various iron oxides mixed together.

Greens and blues, unless there are copper, nickel or chromium deposits around there, are probably also cau ...

Reds and yellows in rocks are usually - in fact almost always - produced by various iron oxides, hematite for the red and goethite (mostly) for the yellow.

At a very small number of localities one ...

I recently purchased some petrified wood pieces from Indonesia and was amazed by the vivid colors that I could see in the pieces with my microscope. I’m curious what minerals caused the different col ...

Author	Message
Topic: Can you ID this piece from Indonesia?
Marco Sr. Replies: 0 Views: 7034	Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Jan 13, 2021 15:08 Subject: Can you ID this piece from Indonesia?
Marco Sr. Replies: 0 Views: 7034	I received the below piece as a gift with some petrified wood that I purchased from Indonesia. I’ve included some close-up pictures from my microscope. I’m not really sure if this is a piece of petr ...
Topic: Minerals in Indonesian petrified wood
Marco Sr. Replies: 4 Views: 5202	Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Jan 13, 2021 14:44 Subject: Re: Minerals in Indonesian petrified wood
Marco Sr. Replies: 4 Views: 5202	Orange is probably goethite too, and brown is probably various iron oxides mixed together. Greens and blues, unless there are copper, nickel or chromium deposits around there, are probably also cau ...
Topic: Minerals in Indonesian petrified wood
Marco Sr. Replies: 4 Views: 5202	Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Jan 13, 2021 12:05 Subject: Re: Minerals in Indonesian petrified wood
Marco Sr. Replies: 4 Views: 5202	Reds and yellows in rocks are usually - in fact almost always - produced by various iron oxides, hematite for the red and goethite (mostly) for the yellow. At a very small number of localities one ...
Topic: Minerals in Indonesian petrified wood
Marco Sr. Replies: 4 Views: 5202	Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Jan 13, 2021 08:47 Subject: Minerals in Indonesian petrified wood
Marco Sr. Replies: 4 Views: 5202	I recently purchased some petrified wood pieces from Indonesia and was amazed by the vivid colors that I could see in the pieces with my microscope. I’m curious what minerals caused the different col ...