On top of it, the marketplace for diamonds can be really confusing. There are grades of clarity and color that lead to an overall quality rating. And, of course, diamonds are very expensive. The ...

Jeweler Harry Winston donated the famous Hope Diamond—the largest-known deep blue diamond in the world—to the Smithsonian Institution in 1958. It arrived in a plain brown package by registered mail, ...

Diamonds are prized for their hardness. In jewelry, they can last generations and resist scratches during day-to-day wear. As blades or drill bits, they can penetrate almost anything without getting ...