Does a Real Diamond Sparkle Rainbow?

We all love how a diamond shines in the sunlight. Test your stone by putting it in direct sunlight and examining the colors it reflects. A real diamond will reflect both rainbow colors as well as white light. If you only get one of the two, then the diamond isn't real.

Why does my diamond look like a rainbow?

Real diamonds sparkle rainbow colors when their light is deflected to other surfaces. In other words, colors shoot from the diamond when the direct light hits the stone. This flash of colors from a diamond is called “fire.”

Do diamonds put off rainbows?

The way that diamonds reflect light is unique: the inside of a real diamond should sparkle gray and white while the outside should reflect a rainbow of colors onto other surfaces. A fake diamond, on the other hand, will have rainbow colors that you can see inside the diamond as well.