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. After awhile I figured that meant the tourmaline did not have copper in it , but to be sure that the stone was tested for copper, I asked the jeweler to call and confirm that. It was confirmed that it does no have copper. My spectrometer has problems with identifying copper in purplish reds because of absorption in the infrared by manganese +3. I still think the stone will be purchased.
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Recent Posts
- No Paraiba in top ten list of most valuable/rarest or beautiful gemstones??
- #261 and a bright red cuprian smile
- Included bright sparkling red round. #261
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- The amount of lead in tourmaline.
- Color my world of tourmaline.
- Copper’s limited roll in coloring Paraiba/cuprian tourmaline.
- Paraiba and rarity, the dream of copper.
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