​The Messengers from the Mantle: Diamonds and Craton Roots Exhibition was developed by the Kimberlite Research Group at the University of Cape Town to highlight scientific advances in the study of the Earth’s interior and to showcase a selection of the roughly 14 000 unique rock specimens from the Earth’s upper mantle currently held in the John J. Gurney Upper Mantle Research Collection at the University of Cape Town. The Exhibition was developed from 2014 – 2016 and championed by the late John Gurney