Henan Yuda Crystal Co.,Ltd
Henan Yuda Crystal Co.,Ltd
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FG VS VVS 0.005ct - 0.03ct Per Pcs HPHT Melee Diamonds For Diamond Jewellery
HPHT Melee Diamonds Description
Nowadays people can use advanced technology to simulate the formation conditions of natural diamonds under the earth's crust to create lab grown diamonds. This formation process is the main factor that distinguishes lab-created diamonds from mined diamonds. The chemical, optical and physical properties and crystal structure of lab grown rough diamonds are basically the same as natural diamonds. Although the place and conditions of formation are different, the essence is the same.
Lab grown diamonds is usually produced by chemical vapor deposition (CVD) or high pressure high temperature (HPHT) methods.
1. High pressure and high temperature (HPHT)
The laboratory simulates the high temperature and pressure conditions of natural diamonds when they are formed underground. HPHT diamonds are manufactured at a pressure of 5-6 GPA and a temperature of 1300-1600°C.
Low-quality natural diamonds and unprocessed natural diamonds can be processed through the HPHT process to improve color and clarity. In addition to increasing the color grade of colorless diamonds.
2. Chemical Vapor Deposition (CVD)
Scientists are able to manufacture synthetic diamonds at moderate temperatures (700°C to 1300°C) and low pressures by using CVD technology. The carbon-containing gas is pumped into the vacuum chamber, deposited on the diamond seed, and crystallized into rough laboratory-grown diamonds. The final size of the diamond depends on the time allowed to grow.
Can we distinguish between laboratory grown diamonds and natural diamonds?
Yes it is. However, only diamond professionals can identify the difference between laboratory grown diamonds and natural diamonds by using professional diamond identification equipment.
Parameters of HPHT CVD Melee Diamonds
| Lab Grown Melee Diamonds Details | |
| Brand Name | Yuda Crystal |
| Name | Lab Grown Melee Diamonds |
| Diamond Color | FG |
| Diamond Clarity | VVS-VS |
| Diamond Carat Weight | 0.005-0.03 carat |
| Diamond Cut | Excellent, Very Good,Good |
| Polish | Excellent, Very Good,Good |
| Symmetry | Excellent, Very Good,Good |
| Technology | HPHT |
| Size | 1mm - 2mm |
| Shape | Round |
| Diamond Enhancement | None |
| Available Type | HPHT |
| Diamond Certificate | None |
| Application | Jewelry Decorations Rings Earring Necklace |
| Place Of Origin | Zhengzhou, China |
| Delivery Time | 1 - 7 Working Days Base on Order Quantity |
| Payment Terms | 100% Payment In Advance |
| Payment Methods | T/T, PayPal, Western Union, Bank Transfer |
| Shipping way | DHL, FedEx, SF Express, UPS, EMS, TNT etc |
| M.O.Q | Negotiable |
| Diamond Type | Synthetic(lab created) |
| Location | Zhengzhou, China |
| Treatments Applied | None |
| Fire Dispersion | 0.044(Same as Natural Diamond) |
| Brilliance Refraction Index | 2.42(Same as Natural Diamond) |
| Relative Density | 3.52(Same as Natural Diamond) |
| Chemical Composition | Carbon(Same as Natural Diamond) |
| Moh's Hardness | 10(Same as Natural Diamond) |
HPHT CVD Melee Diamonds Introduction
Natural diamonds are created by nature and are the result of high temperature and pressure formed over billions of years. The Rough Lab Grown Diamonds are produced in the laboratory, usually in a few weeks. The chemical difference between the two is same.
So how do you distinguish between Rough Lab Grown Diamonds and natural diamonds?
There is no obvious difference between the Rough Lab Grown Diamonds and natural diamonds. Even professional gemologists need special equipment to identify them. By zooming in, professionals will be able to discern subtle contrasts in diamond inclusions grown and mined in the laboratory.
| The Difference Between Lab Diamond And Natural Diamond | ||
| Properties | Earth Mined | Lab Created |
| Guaranteed Conflict-Free | No | Yes |
| Hardness (MOHS) | 10 | 10 |
| SP3 Carbon Diamond Bonds (%) | 100% | 100% |
| Internal Crystal Structure | Face-Centered Cubic | Face-Centered Cubic |
| Hardness Comparable | 2.42 | 2.42 |
| Relative Diversity | 3.52 | 3.52 |
| Color Diffusion | 0.044 | 0.044 |
| Color | Various Grades | K to D grades |
| Price | $$$$$ | $$$ |
HPHT CVD Melee Diamonds Details
