HPHT/CVD
Welcome to Hydray, buy HPHT/CVD laboratory grown diamonds
Menu
Welcome to Hydray, buy HPHT/CVD laboratory grown diamonds
Synthetic Moissanite with Hexagonal Negative Cavities. Synthetic Moissanite (Silicon Carbide) a well-known substitute of Diamond. But easily differentiable from Diamond with its strong doubling and fine sub-parallel stringers oriented parallel to its optic axis direction. Download
GIGAJEWE Loose Diamond CVD white color Heart cut With IGI certificate lab grown round brilliant cut man made Diamond. $2000.00 $2300.00. Add To Cart. GIGAJEWE Loose Synthetic CVD Rough 1 Carat White Color Rectangular Cushion Cut with IGI Certificate Lab Grown Diamonds. $2000.00 $2400.00.
Guaranteeing the highest quality diamonds and ensuring a verifiable Chain of Custody means securing third-party certification from the most trusted sources — the International Gemological Institute (IGI) and Gem Certification & Assurance Lab (GCAL) grade our diamonds according to the traditional 4Cs and SCS Global Services provides our SCS-07 Sustainability Rating and verifies Climate ...
2020-10-1 · The International Gemological Institute (IGI) recently graded a 116-carat, black synthetic diamond that ranks as the largest lab-grown diamond of its color. The 115.65-carat, type IIb stone was produced by UK-based Meylor .
2021-6-10 · The International Gemological Institute (IGI) has discovered a 6.18-carat synthetic diamond that fraudsters had misrepresented as natural by falsely pairing it with a mined-diamond grading report. "This is the largest lab-grown diamond ever certified by a leading gemological laboratory where the sole purpose was to pass off a lab-grown stone ...
2019-5-18 · IGI is improving, but is still not on par with GIA... The Gemological Institute of America or GIA is the best lab in the world. It is very consistent, and a standard bearer for diamond certification in the industry. The International Gemological Institute or IGI is also a very large institution, and it has been around since 1975.
The Chemical Vapor Deposition (CVD) process releases carbon from plasma. This involves superheating hydrocarbon gas in a vacuum to between 3,000-4,000C, at which point the carbon atoms begin to separate from their molecular bonds. Those atoms descend and land on a flat wafer of previously grown synthetic diamond and grow in vertical layers.
2021-6-10 · The International Gemological Institute (IGI) has discovered a 6.18-carat synthetic diamond that fraudsters had misrepresented as natural by falsely pairing it with a mined-diamond grading report. "This is the largest lab-grown diamond ever certified by a leading gemological laboratory where the sole purpose was to pass off a lab-grown stone ...
Laboratory Grown diamonds, also referred to as "man-made," "created" or "synthetic" diamonds, are diamonds manufactured in a laboratory, as opposed to natural diamonds, which formed within the Earth. The IGI Laboratory Grown Diamond Report provides the same information as the IGI Diamond Report but the color of the report is yellow.
IGI Diamond Reports give an accurate assessment of a diamond's cut, color, clarity and carat weight according to strict international standards. Offered in different formats to serve consumer needs across diverse worldwide markets, every report is issued according to the strict international standards and security features for which IGI is known.
Polished Diamond This course is fast-paced and will quickly bring you to a level where you can identify, grade and price diamonds according to international grading and trading practices. It will give you a thorough understanding of the grading standards followed worldwide and is ideally suited for individuals with tight time constraints.
We asked for price quotations for "CVD diamonds sized 0.50-0.69 carats (some 75 stones) with GIA natural diamond certificate.". Dubey replied immediately: "We can supply the size you required at US$790 per carat. The cost of certificates will be $75 each. .
The certificate is a diamond grading report, describing objective factors, both qualitative and quantitative, and an almost infinite combination of all of the variables, based on the 4 c's (cut, clarity, color, and carat), measurements, and physical properties, define each .
0.01-2.0 carat size GIA IGI certificate loose synthetic diamond gemstone stone for sale Zhengzhou Better Star Trade Co., Ltd. US $150.00-$300.00 / Carat
2012-5-21 · May 22, 2012 10:32AM By vinod Jain: IGI should also disclose the name of the parties who have given the man made synthetic diamonds for grading. People in indian market are buying and selling diamonds without certificate so if IGI disclose the name of such persons and parties that would be much better for the industry and traders, they will be cautious in trading and will be saved from wrong ...
0.5-1ct per stone pink color Lab grown synthetic CVD diamond polished diamond with IGI certificates. $4,000.00 ... 1 Carat (Min. Order) 1-3ct blue and pink Polished CVD HPHT Synthetic diamond Loose IGI diamond. $2,400.00 - $2,500.00 / Carat. 1.0 Carats (Min. Order) All Products. Customization. ... International - Español - Português - Deutsch ...
In many cases of polished diamonds certification, in house analysis of cut, symmetry differs from the analysis of GIA, IGI, HRD results. And diamond manufacturer ends up with repairing of polished diamond to reach near the result given by GIA or other labs. But not every individual manufacturer can estimate the exact percentage of repairing or ...