Scientists have offered new insights into the origin of diamonds in ureilites (a group of stony meteorites). These diamonds most likely formed by rapid shock transformation from graphite (the common ...

Two diamonds from South Africa’s Voorspoed mine provide a rare direct insight into the chemistry of Earth’s mantle. Although diamonds can be formed in multiple ways, the findings add to evidence ...

The Hope and Koh-i-Noor diamonds—two of the most famous Golconda diamonds—may have come from southern India’s Wajrakarur Kimberlite Field, according to a team of researchers that reviewed the possible ...