Photo 1 - fluor photos on the left / daylight "normal" photos onthe right. From top they are a black diamond with blue fluor, weird yellow/brown/green/grey diamond asscher with green fluor, Mahenge spinel, chameleon diamond with yellow fluor, white diamond with very strong blue fluor.
Photo 2 - Ruby
Photo 3 - Diamond ring with degrees of fluor!
Photo 4 - Purple sapphire with strong fluor next to a Sphene that shows no fluor.