Thank you so much for this. This is the best explanation I've read so far about this.
I now have a total of four pieces from gojade / eBay - two show fluorescence. This is the big pale green / pale lavender donut I just got in today. The glow areas are where the lavender is, and those orange spots are also very small glow spots. I set the donut in a cup of hot water for a couple hours hoping to work off some of the wax, and it didn't work. It was still very waxy when I scrubbed it down. If this glow is from a wax dip, do you think the glow be more even throughout the donut, or it just made the lavender part glow because that's just how the wax interacts with it under UV?
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It looks like wax used to polish or to fill in porous areas to me.
Here are a few pics for you to compare. The color polish "dip" has been worn thin through my experimenting on it, but has a uniform glow in areas with direct UV light. And, I included a close-up where you can see a dark spot. Under a loupe, you can see that's not a regular iron spot, but purple color polish dye which has settled into a pore or divit.
The B&C speaks for itself- it GLOWS all over, even in ambient UV light.
The A carving is from 3Jade, a reputable seller of nephrite, but who I have found to be trustworthy and straightforward in responding to questions. The glow is in areas where wax has settled, or even where a type of repair work may have been performed to reinforce fissures. I've seen that type on porous bangles in areas that are smoothed over, and the deeper areas or lines hold the UV reactive stuff.
It's so hard to tell from pictures, but your pi looks like it has the reflection of the UV light, and some glowy areas that are where wax has settled in to smooth out rough areas of the stone. Sometimes that wax is helping to maintain the structural integrity of the jade if it has a naturally "loose" formation. I don't remove it because I don't want pores to start falling out (I have a habit of rubbing rough spots). But if it's important to you, pure eucalyptus oil has done a good job removing wax from jade for me in the past; however, it can also destroy or remove the polish (a combo of wax or other fats). With polish loss and/or excessive heat, orange peel appearance can show up.


