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 Post subject: How can I tell if what I have is coltan?
PostPosted: Sun Mar 06, 2016 8:21 pm 
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I recently went on a trip to Mexico around Queretaro where I was told there were meteorites, and I came upon a metallic rock. I know it's not a meteorite because I already had a meteoroligist test it. The closest type of metal to me that it looks like it's coltan, but I don't know for sure if it is. I wanted to know from someone that is familiar with metals what could this possibly be?

http://youtu.be/UiryaD1fuVk


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 Post subject: Re: How can I tell if what I have is coltan?
PostPosted: Sun Mar 06, 2016 10:27 pm 
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1. If a meteorologist tested it, what were the results?
2. Check Wiki:
https://en.wikipedia.org/wiki/Coltan

Coltran isn't found in Mexico.


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 Post subject: Re: How can I tell if what I have is coltan?
PostPosted: Mon Mar 21, 2016 2:28 pm 
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"Coltan" is columbite-tantalite, typically small black tabular crystals with the corners lopped off. Their source is a pegmatite rock, usually hosted within (or close to) a mass of granite. The rock in the video closely resembles an iron mineral such as limonite or "ironstone."

Dick Davies


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