The article explores the origins of CLIPPIR diamonds, a rare class of diamonds formed over 400km beneath the Earth's surface in the mantle transition zone.These diamonds, including the Cullinan, Lesedi La Rona, and Motswedi, provide insights into Earth's deep interior processes.

Research by geologists at the University of Cape Town reveals that CLIPPIR diamonds originate from recycled ancient oceanic crust, transformed into diamonds under extreme heat and pressure.Kimberlite magmas carry these diamonds to the surface, with iron-rich olivine in kimberlites indicating potential for CLIPPIR diamonds.

The study highlights the complex journey of these diamonds from seafloor to mantle to continental roots, offering new clues for diamond exploration in regions like Sierra Leone and Angola.

The findings underscore the role of mantle plumes in transporting diamond-bearing material and the importance of understanding deep Earth recycling processes.