Diamonds are made out of carbon — highly organized carbon, that is. Geologists are still guessing how diamonds formed in 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, ...

Formed millions to billions of years ago, diamonds can shine light into the darkest and oldest parts of the Earth's mantle. The analysis of ancient, superdeep diamonds dug up from mines in Brazil and ...

Washington, DC--New research from a team including Carnegie's Steven Shirey and Jianhua Wang explains how the world's biggest and most-valuable diamonds formed--from metallic liquid deep inside ...

A 37-carat diamond, half pink and half colorless, found in Botswana, intrigues scientists due to its two-stage origin and ...

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New evidence suggests these blue stones originated surprisingly close to Earth's core. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Two of the ...

Despite being around since the 1950s, lab-grown diamonds have only recently exploded in popularity. Allied Market Research states that, in 2022, the global diamond market was valued at $100.4 billion ...

Pink diamonds are extremely rare and coveted — a now-closed mine in Australia has been the source of 90% of the colored gemstones. Polished pink specimens of the highest grade can sell for tens of ...

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 ...