Extras

Video thumbnail: NOVA Why Diamond Light is Beautiful

NOVA

Why Diamond Light is Beautiful

Much of a diamond's brilliance and fire comes down to physics.

Why Diamond Light is Beautiful

Video thumbnail: NOVA Treasures of the Earth: Gems Preview

NOVA

Treasures of the Earth: Gems Preview

What processes in the depths of the Earth forge beautiful and precious stones?

Treasures of the Earth: Gems Preview