In a kimberlite pipe and also in altered silicic lavas.
IMA Status:
Valid Species (Pre-IMA) 1957
Locality:
Bultfontein diamond mine, Kimberley, Cape Province, South Africa. Link to MinDat.org Location Data.
Name Origin:
Named for Cecil John Rhodes (1853-1902), British founder of the DeBeers Mining Company and for Rhodes University, Grahamstown, South Africa where the mineral was studied.