The Manufacturing Process of Lab-made Diamonds
Lab-made diamonds are polycrystalline diamonds formed by the aggregation of diamond crystals with a diameter of 10 to 30 nanometers. The molecular structure of man-made diamonds is not the complete octahedral structure of natural diamonds but a complex structure, which will produce phosphorescence. The lab-made diamond certificate will clearly indicate that the diamond is a man-made diamond, which is different from natural diamonds and protects the interests of consumers.
In a high-temperature and high-pressure environment of 2300℃ and 150,000 to 180,000 atmospheres, a small natural diamond is placed as a seed in the center, a high-temperature metal liquid is placed around the seed drill, and the upper layer of the metal solution is graphite. In this environment The carbon atoms in the graphite will line up from the metal atoms to the diamond to form a new diamond.
1. High-temperature and high-pressure synthesis method: temperature and pressure are still two key factors for crystal manufacturing. According to jewelry professionals, the method is to manufacture diamonds in ceramic containers instead of underground. Water pressure provides high pressure, electricity generates high temperature, and carbon A crystal is formed around a seed crystal made of natural diamond with a diameter of 1 mm.
2.Chemical vapor deposition synthesis method: After heating natural gas and nitrogen, a carbon plasma is formed in a pressure chamber the size of a dishwasher. The plasma is continuously deposited on the carbon bottom layer at the bottom of the pressure chamber, and gradually accumulates and It hardens to form diamond flakes, which are then cut into gemstone shapes.
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