Ab grown diamond is generatly produced ty chemical vapor deposition (CVD) or high pressure high temperature(HPHT) methods that be similar to natural diamond in quatity. It is an Eco-Friendly product which created through non-polluting technology and without environmental pollution. Within the last decade, the synthetic diamond has received much attention, because it allows many new apptications of diamond avlitable that had previousty been considered too dimcult. With advances in human technology, scientists have moved the environment of natural diamonds into the laboratory. By using high presure high temprature(HPHT)to simulate the entire growing environment of the diamond, with gravel-sized diamonds as seeds and grown.