The GIA Diamond Clarity Grading Scale The Gemological Institute of America analyzes diamonds that come in and out of their laboratories according to a clarity scale that was created in the 1940s. The clarity scale was created alongside the other three of the 4Cs of diamond quality: cut quality, color grades, and carat weight.Unfortunately for customers like you, GIA certified stones will come at a higher cost, for a variety of reasons. For starters, their certification costs are a lot higher than IGI’s. Additionally, GIA has fewer global offices than IGI, thus, logistically getting a stone certified by GIA is a costly endeavour, in both time and money.Although GCAL and IGI can both provide accurate assessments of a diamond’s qualities, I recommend GCAL and GIA diamonds. If it’s lab-created, both IGI and GCAL are great choices. Even a one or two grade difference on a diamond’s four Cs can dramatically increase the final cost, so you need a strict grading …Here's How I Would Trade JPMorgan Right Now...JPM JPMorgan Chase (JPM) is one of the most recognized financial institutions in the world. Even people removed from the securitie...IGI provides useful information such as crown height for many fancy shapes (oval, princess, marquise). GIA are a little stricter than IGI. On average 1 colour and 1 clarity difference. You don't often see GIA labs in VVS1, you find plenty of VVS2, where in IGI you will find heaps of VVS1.Both GIA and IGI certifications offer reputable assessments of a diamond’s quality, and the choice ultimately depends on the buyer’s preferences, budget, and time …GIA and IGI are two of many diamond certification laboratories in the world. As each lab uses its own diamond grading system, it is possible that the results...SAN FRANCISCO, Aug. 6, 2021 /PRNewswire/ -- A new market study published by Global Industry Analysts Inc., (GIA) the premier market research compa... SAN FRANCISCO, Aug. 6, 2021 /P...In the simplest terms, a diamond graded as ‘ideal cut’ will be from AGS diamond grading laboratory, while a diamond graded as ‘excellent cut’ will be graded from the GIA diamond grading laboratory. These are the two most respected grading labs in the USA, and like to many titans of industry, they have an interesting history.In natural diamonds, GIA and AGS are the sought after grading. IGI is fine. They are nowhere near an industry standard. But, they are getting popular because of lab diamonds. I find IGI stones to be softer on color and clarity as compared to GIA. Compared to 30 years ago, GIA and AGS are softer than they used to be. 12.GCAL vs IGI. When it comes to diamond certification, both GCAL and IGI have carved out their own niches in the industry. The International Gemological Institute (IGI) has long been a trusted name, especially in the realm of lab-grown diamonds. ... GCAL vs GIA. The Gemological Institute of America (GIA) is undeniably one of the most renowned and ...A family health history is a record of a family's health information. It includes your health information and that of your grandparents, aunts and uncles, parents, and siblings. A ...6 days ago · Yes, you can find a GIA certified lab created diamond if you look hard enough. However, they aren’t that wide-spread. IGI certification for lab-created diamonds, however, is more common and includes all the specs you need to safely compare diamonds. Here is a stunning 1.50ct lab-grown diamond from Brilliant Earth. rendering and formatting your report check... ...For lab-grown diamonds, the GIA was only offering ranges for the color and clarity categories. This was in stark contrast to the grading house IGI, who have been offering full grading reports on lab-grown diamonds since 2005. For example, let's say a diamond is graded out by the IGI as a 1.00 carat round brilliant, G Color, SI1 Clarity.Are you looking for a payroll solution? Read our ExcelPayroll review to determine whether its features fit your requirements. Human Resources | Editorial Review REVIEWED BY: Charle...In 1972, an iconic strike at GM's Lordstown plant forced America to confront the human need for meaningful work. When General Motors announced last month that it was shutting down ...It seems like GIA couldn’t keep up with their demand in volume, so Tiffany went and established their own laboratories and certificates. Tiffany goes on to state that their labs are better and more strict than GIA because GIA doesn’t Guarantee the quality of the Diamond. Tiffany does! This is true. GIA doesn’t guarantee the actual quality ...Laboratory-grown diamonds are 100% conflict free, produced by salaried workers in safe and controlled factory environments and don’t do harm to the environment as mining in the earth for natural diamonds does. Critics say no. The power consumption required to create and operate laboratory-grown-diamond presses and plasma …Diamond certifications are issued by a gemological lab and describe a diamond’s specs such as its color, clarity, and carat weight. A diamond certification helps you verify what it is you’re buying. There are many gemological labs that provide diamond certifications, including the GIA, EGL, DGC, HRD, IGI, and others. TL;DR IGI says our cut is better than GIA does, but GIA says our clarity is better than the IGI does. Background: we wanted a lab diamond. I had read about the certification companies on here, specifically that the IGI is a bit more lenient than the GIA. I bought ours from a local place here in NYC (will post info if that's allowed). Jan 16, 2024 · Both GIA and IGI certifications offer reputable assessments of a diamond’s quality, and the choice ultimately depends on the buyer’s preferences, budget, and time constraints. Regardless of the certification chosen, the key is to prioritize transparency, quality, and accuracy to ensure a satisfying and informed purchase. IGI. Though the International Gemological Institute (IGI) is not as old as the GIA, it is one of the most trusted diamond testing companies based in Europe. Founded in 1975 in Antwerp, Belgium, the IGI has grown to become an enormous international network of laboratories, with offices in more than a dozen cities around the world.Any outside party that wants to use GIA terms should use GIA standards. What you're actually doing here is throwing the GIA and the AGS under the bus. You're effectively saying that you need a trustworthy diamond dealer to purchase a diamond, because there are bad lab reports in the industry. This is partially true.Furthermore, an IGI certificate is one frequently recommend lab certificate for lab diamonds. In 2020, the GIA updated their lab diamond reports with more information than it originally had for years. They now state the process used. However, the IGI lab diamond reports tell you if blue nuance or brownish tint in a lab diamond is present.In natural diamonds, GIA and AGS are the sought after grading. IGI is fine. They are nowhere near an industry standard. But, they are getting popular because of lab diamonds. I find IGI stones to be softer on color and clarity as compared to GIA. Compared to 30 years ago, GIA and AGS are softer than they used to be. 12.You can check out how all four of the major players in diamond certification compare to each other in this post on GIA vs AGS vs EGL vs IGI. EGL USA vs EGL International: A Brief Contrast. Contrary to popular belief, EGL USA and EGL International are distinct entities, each with its unique set of grading standards and market reputation.Main Differences Between a GSI vs a GIA Certification: A GSI certificate was created for chain retailers, whereas GIA certificates were created for everyone. GSI diamond certifications have been around since 2005, whereas GIA diamond certifications have been around since 1940. You're likely to run across a …Oct 18, 2023 · GSI diamond certifications have been around since 2005, whereas GIA diamond certifications have been around since 1940. You're likely to run across a GSI certified diamond at a local chain retailer, whereas more GIA certified diamonds are found shopping online. The GIA is the world's leading resource in diamond and gemstones, whereas the GSI ... GIA stands for “Gemological Institute of America”. The GIA is a non-profit research organization based in Carlsbad, California in the year 1931. Their purpose was to research, educate, and grade natural gemstones. Since there was no official method of diamond grading at the time, they decided to make their own standard to diamond grading.Both GIA and IGI have garnered trust within the industry, each offering distinct advantages. In terms of cost, the price differential between IGI and GIA diamonds is usually marginal and can depend on the retailer. With GIA-certified diamonds carrying a modest 0.5% to 4% premium, the variance is hardly a deal-breaker.The GIA landed at the top, right ahead of IGI. In fourth place was HRD. This demonstrated how the specific grades on an HRD report may be higher than the IGI for the same diamond. For example, HRD may decide a diamond has an E color grade, while IGI could label it F. It’s not that HRD’s grades aren’t accurate.GIA is known for harsh grading, so you can feel more confident that it’ll be accurate. Yes, it matters! IGI is not as strict in their grading as GIA, so if two stones have the same grade, one GIA and one IGI, they won't look the same! I made a video about GIA vs. EGL a while ago. Same principle applies here.Jul 11, 2023 · Both of these prestigious organizations have set high standards in gemological research and diamond grading, but each has its unique approach and methodology. In this blog post, we’ll explore the evolution of diamond certifications, the differences between IGI and GIA, and how these certifications impact the value and quality of a diamond. rendering and formatting your report check... ...The IGI (or the International Gemological Institute) is the largest independent gemological laboratory in the world. Established in 1975, it has locations in all major diamond trade cities. An IGI diamond certification (grading report) evaluates the diamond on its quality and structure as well as the 4 C’s: cut, clarity, color, and carat ...May 17, 2021 · Although GCAL and IGI can both provide accurate assessments of a diamond’s qualities, I recommend GCAL and GIA diamonds. If it’s lab-created, both IGI and GCAL are great choices. Even a one or two grade difference on a diamond’s four Cs can dramatically increase the final cost, so you need a strict grading system that won’t overvalue ... GIA vs IGI. หากมีเพชรใบเซอร์สองเม็ด เช่น เพชร 1.00 F color vs1 3EX สเปคเดียวกันเลย ทั้งสองเม็ด ... เม็ดหนึ่งมาจากสถาบัน GIA อีกเม็ดมาจากสถาบันอื่น ...IGI’s grading of natural diamonds is a bit looser than GIA, often 1-2 grades off in color and 1 grade off in clarity. In terms of lab diamonds, it has been our experience that IGI is consistent and generally trustworthy. IGI was among the first gem labs to issue grading reports for Lab Diamonds, and they seem to have taken the task seriously.May 26, 2023 ... IGI Lab Diamond Certification ... The International Gemological Institute (IGI) was established back in 1975, and now has headquarters all over ... The AGS laboratory is renowned for its scientific approach and research in diamond cut grading. Instead of using an alphabetical rating system, AGS uses a scale of 0-10 for rating a diamond’s characteristics, with 0 as the best and 10 as the worst. Like GIA, AGS is also known for their ethical standards and consistency in their grading system. How to Withdraw Funds From a Keogh Plan. A Keogh plan can provide self-employed individuals with a great way to save more money for retirement. You must follow specific rules, howe...GIA vs IGI. หากมีเพชรใบเซอร์สองเม็ด เช่น เพชร 1.00 F color vs1 3EX สเปคเดียวกันเลย ทั้งสองเม็ด ... เม็ดหนึ่งมาจากสถาบัน GIA อีกเม็ดมาจากสถาบันอื่น ...In this blog, we will compare GIA vs IGI certificates to help you make an informed decision. GIA Certificate: The Gemological Institute of America (GIA) is one of the most respected and trusted diamond grading organizations in the world. It was founded in 1931 and has been providing diamond certification services for …IGI Vs. GIA: Diamond Grading Review And Comparison. Following our evaluation and comparison of diamonds graded by IGI and GIA, we’ve noticed a slight change in …Over the 10 stones, the average grade for the GIA-graded stones was 14.8 while the average grade for the HRD-graded stones was 16.3—a difference of 1.5. In this experiment, HRD ranked below (in order) GIA, IGI and EGL USA.In 1972, an iconic strike at GM's Lordstown plant forced America to confront the human need for meaningful work. When General Motors announced last month that it was shutting down ...IGI. The International Gemological Institute tends to grade diamonds somewhat looser in color and clarity when compared to the GIA, but is still consistent in its grading standards. AGS. The American Gem Society was the first lab to provide diamond cut grades, using its own cut grading scale, which varies from 0 to 9. …22. Sep 12, 2022. #4. DejaWiz said: IGI - good and very common. GIA - good, but rare. AGS - great, but rarer still. GCAL 8X - minimal effort, maximum payoff. It's possible to find both pinnacles and duds with any grading lab, and I've even seen a few GCAL 8X diamonds online that had minor wonkiness that I'd personally avoid, but I'd … The GIA’s certification process is a little more expensive than the IGI, so you may find that GIA-certified diamonds tend to average at a little more expensive than those graded by the IGI. The IGI vs. The GIA. In all, the GIA is seen as a higher-quality independent lab than the IGI. Oct 18, 2023 · GSI diamond certifications have been around since 2005, whereas GIA diamond certifications have been around since 1940. You're likely to run across a GSI certified diamond at a local chain retailer, whereas more GIA certified diamonds are found shopping online. The GIA is the world's leading resource in diamond and gemstones, whereas the GSI ... The IGI VS The GIA & The AGS. By Tiffany Moore . You may be well versed in the Four C’s of diamond buying (cut, color, carat and clarity), but diamond certification is just as …While the GIA diamonds take the lead in the quality of grading, the IGI diamond takes the lead in saving your wallet. The GIA certified diamonds are sure to …An IGI diamond certification means that a diamond has been professionally analyzed by an IGI gemologist. They have followed strict international standards to determine what the key points of the diamonds are. It helps to compare against other diamonds, to determine the four C’s for the specific diamond, and to assess a price …The Difference between IGI and GIA in Diamond grading the 4Cs: Because the IGI is loosely structured globally, slight inconsistencies among its labs may exist, depending on their location. As a rule of thumb, it is safe to assume a 1-grade color inconsistency in D-I color diamonds between GIA and IGI graded …IGI provides useful information such as crown height for many fancy shapes (oval, princess, marquise). GIA are a little stricter than IGI. On average 1 colour and 1 clarity difference. You don't often see GIA labs in VVS1, you find plenty of VVS2, where in IGI you will find heaps of VVS1. Fancy Colored Diamond Report. Fancy colored diamonds can be yellow, pink, orange, purple, green, blue and beyond. The IGI Fancy Colored Diamond Report describes a diamond’s hue, lightness or darkness of tone and strength of saturation, identifying its position in the gemstone color universe. Learn more Verify. IGI vs GIA vs AGS DIAMOND CERTIFICATION - WHICH IS BEST FOR LAB GROWN DIAMOND? This is a widely debated topic with numerous articles floating around on the internet about the differences between IGI, GIA & AGS diamond certifications. While there is a general consensus on the superiority of labs, what we would like to address in this … GIA is renowned for its consistent grading standards and is often considered more stringent than IGI. IGI offers both mini and comprehensive grading report options, making it a more flexible choice for consumers. In terms of cost, IGI certification is generally more affordable than GIA certification. In natural diamonds, GIA and AGS are the sought after grading. IGI is fine. They are nowhere near an industry standard. But, they are getting popular because of lab diamonds. I find IGI stones to be softer on color and clarity as compared to GIA. Compared to 30 years ago, GIA and AGS are softer than they used to be. 12. Unfortunately for customers like you, GIA certified stones will come at a higher cost, for a variety of reasons. For starters, their certification costs are a lot higher than IGI’s. Additionally, GIA has fewer global offices than IGI, thus, logistically getting a stone certified by GIA is a costly endeavour, in both time and money. The GIA also offers diamond dossiers and complete grading reports in their GIA certificates for diamonds of all sizes. As a result, the GIA’s grading system is more …GIA vs IGI Lab Diamonds: Compared. Now, let's get to it. We compared the two institutes head to head below: Aside from this comparison, the only important difference to note is that IGI's Ideal Rating for round cuts is equivalent to GIA's Excellent Rating. When it comes to fancy cuts like oval, emerald, pear, etc., both certifying bodies use ...GIA scientists publish the first scientific study of laboratory-grown diamonds in 1971. Mid-1980s: Manufacturers grow commercial quantities of gem-quality laboratory-grown diamond crystals. These lab-created diamonds are initially mostly small and yellowish or brownish in color, but their quality improves over the ensuing decades.GIA stands for “Gemological Institute of America”. The GIA is a non-profit research organization based in Carlsbad, California in the year 1931. Their purpose was to research, educate, and grade natural gemstones. Since there was no official method of diamond grading at the time, they decided to make their own standard to diamond grading. GIA is renowned for its consistent grading standards and is often considered more stringent than IGI. IGI offers both mini and comprehensive grading report options, making it a more flexible choice for consumers. In terms of cost, IGI certification is generally more affordable than GIA certification. TL;DR IGI says our cut is better than GIA does, but GIA says our clarity is better than the IGI does. Background: we wanted a lab diamond. I had read about the certification companies on here, specifically that the IGI is a bit more lenient than the GIA. I bought ours from a local place here in NYC (will post info if that's allowed). The Difference between IGI and GIA in Diamond grading the 4Cs: Because the IGI is loosely structured globally, slight inconsistencies among its labs may exist, depending on their location. As a rule of thumb, it is safe to assume a 1-grade color inconsistency in D-I color diamonds between GIA and IGI graded …Oct 18, 2023 ... Main Differences between an IGI vs a GIA Certification · The IGI grading lab has around 20 locations in the world, whereas the GIA has less than ...Nov 12, 2022 · For reliable, consistent, trustworthy certification of your diamond jewelry we recommend the GIA worldwide, or AGS if you’re in the United States, and SSEF if you’re in Europe. For colored gemstones and pearls, GIA, SSEF, and Gübelin are all reputable choices. All the best in your hunt for diamond certification! Discover videos related to igi vs gia for lab diamond on TikTok.It seems like GIA couldn’t keep up with their demand in volume, so Tiffany went and established their own laboratories and certificates. Tiffany goes on to state that their labs are better and more strict than GIA because GIA doesn’t Guarantee the quality of the Diamond. Tiffany does! This is true. GIA doesn’t guarantee the actual quality ...Oct 1, 2023 · The industry’s expectation is the GIA will often grade clarity one level stricter than GSI. That means if a GIA diamond is graded a VS2 clarity, you would expect a VS1 grade from GSI. It’s not that GSI is incorrectly determining the clarity. It’s a subjective measurement, so you can expect some differences. An AGS certificate offers the same reliable consistency as the GIA but have taken the approach to grading a step further, specifically in the crucial area of cut quality. The AGS take a more stringent approach to cut quality, giving grades from 0-10. While AGS offer a more detailed assessment of cut quality, a top designation from either lab ...IGI assesses round brilliant cut diamonds in the areas of polish, symmetry, and proportions (finish). The top cut grade a round brilliant diamond can earn is Excellent-Ideal. Light Performance Report. Diamonds of the same shape can have different visual tendencies. For this reason IGI will issue a light performance report for round diamonds ...September 29, 2022 at 12:59 pm. For lab grown diamonds, IGI and GCAL are fine. They are the only labs that perform lab grown diamond grading on a commercial scale. Hence, most cutting houses will send their diamonds to IGI. For GIA/AGS, they do perform grading for lab grown diamonds too but on a much smaller scale.Dec 30, 2018 ... Comments2 · Lab Diamond Certificates GIA vs IGI, learn what is the best diamond · How To Become A Gemologist? · Moissanite v. · Learn W...A comparison of the differences between IGI and GIA, two reputable diamond certification organizations. Learn about their grading standards, methodology, report format, and cost. Find out which one is best for you based on your preferences and needs.In general, we expect IGI to grade a bit more generously than GIA. This is more of an issue for certified mined diamonds vs certified lab-grown diamonds because skilled growers can produce lab-grown diamonds with excellent color and clarity. Expect to pay a bit less for certified IGI lab grown diamonds than …Aug 5, 2022 · Similar to IGI reports, GIA grading reports include a thorough assessment of the physical characteristics of the gemstone. GIA reports follow the standard 4 C’s grading criteria and include additional focus on: GIA also utilizes a color grading scale to assess the color quality of colored diamonds and gemstones. Getting a diamond graded by EGL is more affordable compared to GIA. This cost disparity is substantial and influences the ultimate price of the diamond. For buyers, EGL offers diamonds at a notably lower price than GIA-graded diamonds. This affordability is a major factor driving EGL’s popularity among buyers.January 24 Through February 4—TUCSON, ARIZONA: Annual show THE GEMOLOGY PROJECT is a free Gemological Encyclopedia that anyone can edit! JOIN NOW! FREE ONLINE GEMOLOGICAL INFO: Houston's Gemological ResourcesIGI Vs. GIA: Diamond Grading Review And Comparison. Following our evaluation and comparison of diamonds graded by IGI and GIA, we’ve noticed a slight change in …IGI vs GIA Diamond Grading. When you make an investment in a gemstone like a diamond, it makes sense that you want to buy a product that you know is genuine and that is ranked as a high-value diamond. Generally, a customer will rely on their jeweler to provide this guarantee which is a standard of the diamond industry. All diamonds should …IGI Certification: The International Gemological Institute, founded in 1975, is a well-known independent gemological laboratory. IGI provides grading reports that assess the 4Cs of a diamond, similar to GIA. However, IGI may be considered slightly more lenient in their grading standards, resulting in potential …GIA vs IGI . Looking for Advice I know that GIA grades more harsh and strict, but I was wondering if the following spec's mattered between the 2. Also GIA Diamonds are seem to be 5-`10% higher than IGI rated diamonds even at the top specs. Color: Would a D for IGI be the same scale as GIA?SAN FRANCISCO, Aug. 6, 2021 /PRNewswire/ -- A new market study published by Global Industry Analysts Inc., (GIA) the premier market research compa... SAN FRANCISCO, Aug. 6, 2021 /P...
In general, an EGL certified diamond compares to a GIA certified diamond of 3-4 grades lower (depending on the particular EGL lab). That’s why James Allen and Brian Gavin Diamonds don’t stock any diamonds certified by EGL. They limit their inventory to diamonds certified by GIA and AGS.. Adult book shop
In general, we expect IGI to grade a bit more generously than GIA. This is more of an issue for certified mined diamonds vs certified lab-grown diamonds because skilled growers can produce lab-grown diamonds with excellent color and clarity. Expect to pay a bit less for certified IGI lab grown diamonds than …For lab-grown diamonds, the GIA was only offering ranges for the color and clarity categories. This was in stark contrast to the grading house IGI, who have been offering full grading reports on lab-grown diamonds since 2005. For example, let's say a diamond is graded out by the IGI as a 1.00 carat round brilliant, G Color, SI1 Clarity.The discussion of AGS vs GIA reveals more similarities than differences between the two labs, with an AGS certificate shedding light in areas lacking in a GIA report. Vatche U-113 6-Prong Solitaire Engagement Ring. ... Labs such as HRD and IGI are traded at lower prices than GIA. In 2015 Rapaport banned EGL affiliated labs from the Rapnet ...6 days ago · Yes, you can find a GIA certified lab created diamond if you look hard enough. However, they aren’t that wide-spread. IGI certification for lab-created diamonds, however, is more common and includes all the specs you need to safely compare diamonds. Here is a stunning 1.50ct lab-grown diamond from Brilliant Earth. IGI certification is typically recommended when obtaining lab diamond grading reports. Lab diamond GIA certificates were revamped in 2020 to match the quality of an IGI report, but unfortunately, most retailers will only carry a GIA natural diamond report, not GIA certificates for lab grown diamonds.IGI's proactive approach in certifying lab-grown diamonds adds to its appeal, while GIA also embraces this shift. Ultimately, the choice between IGI and GIA depends on factors like …Mar 29, 2021 · In general, we expect IGI to grade a bit more generously than GIA. This is more of an issue for certified mined diamonds vs certified lab-grown diamonds because skilled growers can produce lab-grown diamonds with excellent color and clarity. Expect to pay a bit less for certified IGI lab grown diamonds than GIA certified diamonds because the ... The GIA also offers diamond dossiers and complete grading reports in their GIA certificates for diamonds of all sizes. As a result, the GIA’s grading system is more …May 27, 2019 ... Usually, the IGI grade is considered to be half to one grade better than a GIA grade. What that means is that a VS1 grade in GIA might be a VVS2 ...IGI Natural Diamond Reports give an accurate assessment of a diamond’s cut, color, clarity and carat weight according to strict international standards. Learn more Verify Hearts & Arrows Report “Hearts & Arrows” (H&A) diamonds are cut so precisely that their facet reflections overlap when viewed in a reflective scope. The reflections ...GIA and IGI are two of many diamond certification laboratories in the world. As each lab uses its own diamond grading system, it is possible that the results...GIA VS AGS . Both the GIA and the AGS look for the same attributes when grading diamonds, e.g. absence of color and inclusion, light return, etc. The best way to assess any differences is by a direct comparison of their standards and grading systems. ... For example, a diamond graded as a D by the IGI may only be a G in …February 25-26: VALLEJO, CALIFORNIA: Annual show; Vallejo Gem and Mineral Society; Solano County Fairgrounds THE GEMOLOGY PROJECT is a free Gemological Encyclopedia that anyone can edit! JOIN NOW! FREE ONLINE GEMOLOGICAL INFO:1. Look for cheap diamonds that are high quality and certified by GIA, IGI, or IGI as these will be more expensive than natural diamonds. Cheap diamonds can be of lower quality. 2. Check the ...Before we root for somebody, let us give you some context of why jewellers actually choose IGI certified diamonds rather than GIA or GCAL Certified ones. Well actually, jewellers get their stones graded by IGI for a reason. And the reason is that GCAL gives more detailed about the clarity and the color of the diamond by ensuring all the …Unfortunately for customers like you, GIA certified stones will come at a higher cost, for a variety of reasons. For starters, their certification costs are a lot higher than IGI’s. …IGI certifications also provide important details about a diamond's 4Cs. While IGI is well-recognized, it is generally considered one grade lower than GIA for both color and clarity. 3. Why Diamond Certifications Matter. Diamond certifications are essential when purchasing lab-grown diamonds..