Although it is accepted that most natural diamonds crystallized from silicate melts, and P-T conditions of their formation are estimated to be 900-1500°C and 50-60 kbar, no diamonds have been synthesized at such 'low' ...
Experimental results are presented on the etching of diamond crystals in a system including silicate minerals from mantle xenoliths and C-O-H fluid at 5.5-6.0 GPa and 1450-1500°C. Slight etching patterns were established ...
A series of experiments was carried out on the etching of diamond crystals of an octahedral habit in low-temperature alkali basalt melt at 3.0 GPa and 1300 degreesC. Crystal morphologies similar to those of natural diamonds ...