Davies, G., M. Morel, D. Wiggers de Vries, O. Nebel, R. Hin, C. Wijbrans, and D. Pearson. “A Silica Enriched Diamondiferous Spinel Harzburgite from Kapvaal”. International Kimberlite Conference: Extended Abstracts, vol. 9, Oct. 2008, doi:10.29173/ikc3547.