Tag Archives: analysis

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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In the pink, another round for everyone.

I just finished a pink oval from a piece of tourmaline rough from Nigeria.  It turned out to be one of the most fragile pinks I have cut.  And this is from a location that has produced very calm and … Continue reading

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A hot one in the hole, slightly included pink round.#27

I am sure that it takes a variety of factors (known and unknown) to make a great hot pink round.  I can do my  best, but some pinks are hot and some are not.  This is one of those hot … Continue reading

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