Trace element characteristics of diamond and garnet inclusions from Akwatia, Ghana and De Beers Pool, South

REE patterns determined for gem quality diamonds are less fractionated (average NdN/YbN = 6.8) than fluids/melts (average NdN/YbN = 518) modeled from garnet inclusions in the same diamonds. This disparity indicates that the trace element impurities measured in gem diamond likely do not represent the (diluted) composition of diamond precipitating fluids/melts. Microinclusions of minerals that preferentially incorporate HREE over LREE could, however, account for the fairly flat REEN patterns observed in gem diamonds.