A pair of diamonds that formed hundreds of kilometers deep in Earth’s malleable mantle both contain specks of materials that form in completely opposing chemical environments—a combination so unusual ...
Most gems form in a number of places below the Earth's surface and are then brought to the surface through processes like volcanic eruption, mountain building or erosion. At that point, they are ...
When I was a kitten, I loved collecting rocks and gems. So, I was very excited to talk about your question with my friend Johannes Haemmerli. He studies minerals at Washington State University.
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