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- rexguo on Laurellite a reverse color change tourmaline is unique.
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Tag Archives: umbasara
Usambara effect, chrome chromophore, green emerald cut.#420
I will be posting more on the usambara effect in tourmaline, but I will focus more on this specific gemstone in this post. It is always a pleasure to discover something new about tourmaline and then to discover something unexpected … Continue reading
Posted in Dravite, Etc.
Tagged chrome, dravite, emerald cut, green, umbasara, unique
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