| Type: | Diamond |
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| Classification of Diamond: | Artificial |
| Characteristic: | High Hardness |
| Characteristics of Natural Diamond: | Compressive Strength |
| Synthesis of Cubic Boron Nitride Method: | Static High Pressure Catalytic Method |
| Application: | Accessories, Diamond Rings |
| Samples: |
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| Customization: |
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ROUND BRILIANT DIAMOND OF HPHT
Applications:
Our Round briliant diamond is manufactured by HPHT.HPHT (High Pressure High Temperature) is a common method of synthetic diamonds.
The basic principle behind HPHT's cultivation of diamonds is to place a carbon source (usually graphite) in a high-temperature and high-pressure device and apply high-pressure and high-temperature conditions. In this way, the carbon source is gradually converted into diamond crystals. High pressures are typically between 5-6 GPa (50,000-60,000 atmospheres) and high temperatures between 1200-1600 degrees Celsius.
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The process of growing a diamond with HPHT usually takes a few days to a few weeks, depending on the size and quality of the diamond required. During the cultivation process, some catalysts or additives can also be added to promote the growth of the diamond and improve its quality.
Hpht-grown diamonds can have physical and chemical properties similar to natural diamonds, including hardness, refractive index and color.
The contrast between our round brilliant diamond and natural diamonds is as follows:
| Property | our round brilliant diamond | natural diamond | distinction |
| Chemical component | C | C | NO |
| Refractive index | 2.42 | 2.42 | NO |
| Relative density | 3.52 | 3.52 | NO |
| Chromatic dispersion | 0.044 | 0.044 | NO |
| Hardness | 90GPA | 90GPA | NO |
| Temperature conductivity | 2x103 W/M/K | 2x103 W/M/K | NO |
| Thermal expansibility | 0.8X 10-6 K | 0.8X 10-6 K | NO |
| Transmittance | DEEP UV TO FAR TR | DEEP UV TO FAR TR | NO |
| Electrical resistivity | 1016 OHM-CM | 1016 OHM-CM | NO |
| compressibility | 8.3X 10-13 M2/N | 8.3X 10-13 M2/N | NO |
Available size:
| Weight | Dia.(mm) | DEF/VVS-VS | DEF/VS-SI | DEF/SI-11 |
| 0.18-0.22ct | 3.7-3.9 | DEF/VVS-VS | DEF/VS-SI | DEF/SI-11 |
| 0.23-0.28ct | 4.0-4.2 | DEF/VVS-VS | DEF/VS-SI | DEF/SI-11 |
| 0.29-0.38ct | 4.3-4.5 | DEF/VVS-VS | DEF/VS-SI | DEF/SI-11 |
| 0.39-0.48ct | 4.6-5.0 | DEF/VVS-VS | DEF/VS-SI | DEF/SI-11 |
| 0.50-060ct | 5.2-5.5 | DEF/VVS-VS | DEF/VS-SI | DEF/SI-11 |
| 0.70-0.80ct | 5.7-6.0 | DEF/VVS-VS | DEF/VS-SI | DEF/SI-11 |
| 0.9ct | 6.2 | DEF/VVS-VS | DEF/VS-SI | DEF/SI-11 |
| 1.0ct | 6.45-7.5 | DEF/VVS-VS | DEF/VS-SI | DEF/SI-11 |
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