I had invested in a dual UV light (long and short wave) to test my bangles. All my jadeite tested fine. However, one my nephrite bangles fluoresced. After some research, I wouldn't think that nephrite should do this unless it is treated. My bangle came from a reputable seller, 3Jade, along with a certificate that checked out. Therefore, I wrote the seller and shared my results to see their response.
They replied, "The jade bangle is natural nephrite jade without any treatment. We bought the rock and made the bangle. There is no doubt that it is natural material without any treatment. After received your email, I also did some research regarding jade fluorescence. I did not find any information regarding black nephrite. There are lots of information regarding jadeite, and different color jadeite has different fluorescence. The jade certificate of authenticity also shows the bangle is not natural jade. The “REMARK” on the certificate is ****, it means it is natural. If the color is not natural, the remark will be “颜色成因未定”, it means “the cause of color is unknown”."
Overall, I wanted to share this with you and that maybe nephrite can fluoresce (?) along with what my bangle looked like under UV. At this point I am not sure what to do what to think. I guess I will accept their reply and move on.
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