What Causes the ‘Shine’ of a Diamond?

Diamonds shine because they reflect light really well, almost like a magical mirror.

Imagine you're shining a flashlight on a super smooth, super hard glass ball. The more perfect the glass, the brighter it shines. Diamonds are like that glass ball, but even better! They're made of tiny crystals that trap and bounce around the light inside them before sending it back out, making them sparkle.

When light goes into a diamond, it doesn't just come right out. It bounces around inside like a game of tag. The more it bounces, the brighter the diamond looks from outside. This is why diamonds look so shiny and magical when you turn them under a light.

Not all diamonds are the same. If the crystal inside has fewer flaws, or if it's cut perfectly, the light can bounce around more efficiently, making the diamond super sparkly! It's like having a perfect mirror ball instead of a slightly smudged one.