zebra diamonds ?

[yutake]

Only for cientific interest or curiosity , I would like to know on diamonds chameleon, the origin of his change of color; also to know about diamonds of two or more colors, spotted, striped or streaky.
Where might it to obtain in web photography and information?

 

[mdx]

Hi Yutake

The chameleon effect is often caused by strong yellow phosphorus when exposed to UV and then for some time after removing from UV. They are also often thermochromatic, that is they change color with heat changes.
This oval is a chameleon
Johan

 

[yutake]

Thanks Johan.
Do you mean the stone contains phosphore ?
Only Yellows colored are chamalions ?
Thanks again in advantage.

 

[mdx]

Hi Yutake

Phosphorescing diamonds are not that common, so not much is known about them. Color does not appear to be limited to only yellow. green and blue have also been observed.

If I can give you a simple explanation of what it is, perhaps that will help.
Phosphorescence is the ability of a mineral to glow after absorbing radiant energy or other types of energy. Phosphorescence is distinguished from fluorescence in that it continues even after the radiation. As they fall back to their original energy levels, they release their excess energy in the form of light.
Energy is absorbed by a phosphorescent substance, causing some of the electrons of the crystal to be displaced. These electrons become trapped in potential troughs from which they are eventually freed by temperature-related energy fluctuations within the crystal. As they fall back to their original energy levels, they release their excess energy in the form of light.
Impurities in the crystal can play an important role, some serving as activators or coactivators, others as sensitizers, and still others as inhibitors, of phosphorescence.

Johan