Precious gems are formed in different ways and composed of different materials, meaning their appearances vary vastly. Diamonds, made of carbon atoms, are the hardest natural substance found on Earth.

With a lifetime guarantee, they're known as the only lab-created stones needing a carbon test to tell them apart from natural gems. We have an extraordinary collection of women's and men's jewelry.

Only about 30 percent of natural diamonds are considered gem-worthy, and among those, less than 1 percent are fancy color diamonds—that is, diamonds of unusual color. While the latter come in ...

As we move toward a more conscious and responsible future, alternative gemstones are emerging as a viable alternative to ...

Lightbox diamonds come from a $100 million factory in Gresham that opened five years ago. The Oregon site will continue ...

The glittering diamonds sparkle the same but there are key differences: mined natural gems are more than a billion years old, while laboratory-made rocks are new and cost less than half the price.