Color-change fluorite performs a quiet magic trick: blue to violet under daylight, shifting toward purple-rose under incandescent light. Combined with fluorite’s already famous palette, change stones are keenly collected despite the species’ softness (Mohs 4) — display gems par excellence.When available, GEMIC Institute’s color-change fluorites are natural, certified in our laboratory, and filmed under different lighting so you can see the shift on the actual stone. Unique pieces; tracked delivery worldwide, 30-day returns.