Violet sodium TIPS:
When you meet the sun, it seems that its color changes with its mood, which is very interesting. When you slowly fall in love with it, you will find that it can return to its original color after changing color, which will bring you back to the first sight. The ability" originates from {photochromic}, and only the purple sodalite in sodalite has this ability.
It not only quickly becomes deep purple under ultraviolet light, but also fades quickly under tungsten light.