Hourglass Diamonds
Diamond Guide / Light Performance

Light is what gives a diamond its life.

Much of what people respond to in a diamond comes back to light. Brightness, fire, contrast, and movement all shape the way a stone feels once worn, which is why two diamonds can appear very different even before color or clarity become part of the conversation.

Begin here

A few essentials.

Most read

The questions that come up first.

Continue exploring

A closer look.

The Basics of Light

The core ideas behind brightness, fire, and movement, and how they work together.

How Light Moves Through a Diamond

How return, leakage, and contrast patterns shape the way a diamond is perceived.

What You Actually Notice

How cut and lighting conditions influence what a diamond feels like once worn.

Related topics

Where this naturally leads.

When the research becomes specific

Guidance that makes the next step clearer.

Once the basics are clear, the next step is usually comparing how a diamond performs in person, not simply how it sounds on paper.