Category Archives: Tourmaline Analysis

Discussions around the chemistry and spectrometry of tourmaline

Bulk diffusion of copper into tourmaline, wrong all the way around.

I think that I have not written about the bulk diffusion of copper into tourmaline before on this site because, from the start, it was a suspicion that was support by inept science and pushed by the seeking of status … Continue reading

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Results from sending a stone to the GIA to be tested for copper.

Well it took $152 and a month to get the stone back with a report. There is no mention of copper in the report. Instead, it says that the cause of the color in the gemstone could not be determined. … Continue reading

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Sending a tourmaline to the GIA for a report on copper.

I have been working with Laura, my older daughter to try and get a page for selling selected stones on my website. Well it is together now and you can go there from the main page. I am not really … Continue reading

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Market insight into clarity enhanced paraiba type tourmaline

I just had a great conversation with a women who is actively buying large numbers of faceted paraiba type tourmaline.  She had just purchased a beautiful gemstone that turned out to a Laurellite and wanted to discuss it with me.  … Continue reading

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IVCT, intervalence charge transfer, dichroism in tourmaline.

I was searching threw my papers for tax time, when I ran across a copy of a personal email from George R. Rossman of Rossmanite and Caltech.  I want to quote a paragraph on dichroism in tourmaline from that April … Continue reading

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Laurellite a reverse color change tourmaline is unique.

I am sure that I have probably said too much about Laurellite on this site for some people, but questions have arisen and I wish to list the salient points about Laurellite that are important to appreciate it. 1,  Laurellite … Continue reading

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