Fun with Fluorescence!

[Nosean]

0,40 ct Chameleon diamond with strong change (storage in the dark or low heat.


Phosphorescence after SW UV


Heated for a few seconds






A few second LW UV Laser brings back the color ( more graygreen in real live)

 

[MissyBeaucoup]

Thanks for sharing so many beautiful photos, y’all!

 

[Nick_G]

Alluvial sapphire pebbles from Ilakaka, Madagascar:


These were actually sold as spinels, but the fact that the lot includes colourless pebbles, together with obvious pleochroism in the coloured ones all point to sapphire. Note that the blue sapphire top left has no fluorescence due to the presence of iron.