1. When a jadeite bangle emits a purple glow under a UV light, it could be an indication of B-grade jadeite. B-grade jadeite is artificially treated to enhance its appearance, addressing any deficiencies in texture or impurities.2. Natural jadeite generally does not exhibit significant changes under UV light, maintaining its original color as it is less susceptible to紫外線 radiation.3. If your jadeite bangle exhibits a purple glow under any light source, it may be a sign of its artificial nature. Ultraviolet light can cause fluorescent materials to react and turn purple.4. When a jadeite bangle displays a bluish-purple color under UV light, it is often an indication that the jadeite is fake.5. Natural jadeite does not produce a fluorescent response and does not emit light under UV light.6. Jadeite that has been treated with B solution or B+C solution may show a blue-white fluorescence.7. The filler, often epoxy resin, used in B-treated jadeite can emit fluorescence under a fluorescent light, which is similar to using a UV lamp for verification purposes.8. A distinct bluish-purple fluorescence under UV light suggests that the jadeite bangle has been acid-washed and is not natural A-grade jadeite.9. A color reaction under UV light is normal, but a noticeable fluorescence indicates something abnormal.10. It's important to note that the purple reaction under UV light is common, but a fluorescence suggests unusual circumstances that should be investigated.