CLIPPIR is an abbreviation for diamonds that are Cullinan-like, large, inclusion-poor, relatively-pure, irregularly-shaped and resorbed.
Evan Smith and his co-authors studied the inclusions in 53 of these rare CLIPPIR diamonds. 38 of these contained metallic inclusions, and 15 had mineral inclusions that indicate the diamonds' origin at depths between 410 and 660 km. This is an area of the Earth known as the transition zone.
Read more about these extraordinary rare diamonds and discover the new details they told us about the deep Earth.