Diamonds get their brilliance from three things: reflection, refraction and dispersion. Reflection is the light that hits the diamond and is immediately bounced back up, giving it an instantaneous shine.

Does diamond has its own shine?

To start off right: a diamond itself does not shine, it reflects light which gives them their beautiful sparkle. This has three main causes: internal reflection, refraction, and dispersion.

What do you call a person who works with diamonds?

Also called: Diamond Cutter, Diamond Setter, Gemologist, Lapidarist.