Synthetic diamond

Unstained "temperament . Diamond also known as diamond, because it is the very nature of the hardest substances Mohs hardness of 10 , microhardness 10000kg/mm2, quartz micro hardness than 1000 CBN abrasive grit times , 150 times higher than corundum . it 's extremely difficult to form and found that it is carbon in the deep Earth under special conditions of high temperature and pressure after millions of years of " penance " turned into , due to the movement of the crust , they came to the surface from the depths of the earth, hidden in kimberlite , which was discovered and mined humans , although humans can produce a synthetic diamond , but the quality is still far less than the size of a natural diamond .