Diamond – Natural, Rough, Green
These yellow diamonds fluoresce magenta or green under UV light. When the UV light is turned off, they phosphoresce a soft green color afterwards. Diamonds phosphorescing (crystals approximately 1 to 1.5 mm in size), Democratic Republic of the Congo. Photo by James St. John. Licensed under CC By 2.0.
Article: What is Gemstone Luminescence?
Credit: James St. John
|Natural or man made
|Congo, Democratic Republic of the (Zaire)
|Glow in the Dark