Do Diamonds Fog up?

2) Fog Test

A light fog will form on the diamond because of the moisture and heat in your breath. If the fog dissipates right away, the diamond is real. If it takes several seconds for the fog to disperse, it is likely a fake diamond.

Do real diamonds fog up?

If your stone fogs up quite a bit and takes time for the condensation to evaporate, then it is most likely fake. Real diamonds do fog up, but only a little and the condensation evaporates quickly.

Why does my diamond get foggy?

A cloudy diamond appears hazy owing to microscopic inclusions within the stone. In some instances, a concentration of small inclusions clustered together causes the diamond to look foggy, lifeless and dull.