Meyer, N.A., T. Stachel, D.G. Pearson, and J.W. Harris. “A New Look at Diamonds from the Koffiefontein Mine”. International Kimberlite Conference: Extended Abstracts 11 (September 18, 2017). Accessed September 25, 2021. https://ikcabstracts.com/index.php/ikc/article/view/3899.