image: A close-up view of a metallic inclusion in a CLIPPIR diamond. The inclusion is reflective/silver in appearance, surrounded by a black, graphite-bearing decompression crack. Image is 2.56 mm wide. This material relates to a paper that appeared in the Dec. 16, 2016, issue of Science, published by AAAS. The paper, by E.M Smith at Gemological Institute of America in New York, N.Y., and colleagues was titled, "Large gem diamonds from metallic liquid in Earth's deep mantle." view more
Credit: Evan Smith