In this paper industrial diamond crystal was synthesized using FeMn-1# powder catalyst in China-type cubic high-pressure apparatus at 5.7 GPa and 1400-1600 degrees C. The growth feature of diamond in the graphite-FeMn-1# system was researched. Optical microscope observation showed that all the diamond crystals were light yellow octahedral with grain size of 0.3-0.5 mm. There are also plenty of bubbles in the crystals. By SEM, we can see that the surface of diamond is smooth and the crystal is intact. Mossbauer spectrum was used to detect the impurity in the diamonds. (C) 2009 Elsevier B.V. All rights reserved.