> the diamond continues to glow (phosphorescence), natural diamonds don't. Except some famous natural ones, like the Hope Diamond[1] do show phosphorescence.

> the diamond continues to glow (phosphorescence), natural diamonds don't. Except some famous natural ones, like the Hope Diamond[1] do show phosphorescence. [1] https://en.wikipedia.org/wiki/Hope_Diamond https://en.wikipedia.org/wiki/Hope_Diamond