When shopping for a diamond, a GIA diamond certification is your assurance that you’re investing in a diamond that’s been rigorously graded for quality, authenticity, and brilliance.

With this in mind, verify Your Diamond’s Authenticity Now: Use our GIA Certificate Checker to confirm the quality and grading of your diamond instantly. Simply enter your GIA report number below to get started!

Navigate This Guide:

• Introduction
• 7 Key Tips for Buying an Engagement Ring With GIA Certification
• What is GIA Diamond Certification? 
• GIA Certification Process
• Decoding the 4Cs in GIA Reports
• How GIA Certification Influences Diamond Value
• GIA Certification Cost
• GIA’s Global Influence and Accessibility 
• Conclusion
• 9 FAQs
• GIA Campuses and Global Locations

Introduction

If you’ve spent any amount of time on our site, then you’ve no doubt come across the name ‘GIA’ more than once already. Even if you’re still unsure what, exactly, it refers to, you’ve probably been able to surmise that it’s pretty central to the process of buying a beautiful diamond.

Put simply, the GIA – or, in full, the Gemological Institute of America – is a non-profit organization dedicated to maintaining an incredibly high standard for grading diamonds before they are made available to prospective buyers.

They are also the forerunners of the Four Cs – cut, color, clarity and carat – which represent the most significant aspects of any diamond’s beauty and value, although many other bodies have put their own interpretation on ‘The Four Cs’ over the years.

GIA diamond is a term you will come across when shopping for an engagement ring, and it certainly pays to understand how you can use it as a guide during your search. Learn about GIA diamonds and why savvy shoppers trust GIA.

Before we dive deeper into the specifics, here are some practical tips to help guide your decision-making process:

7 Key Tips for Buying an Engagement Ring With GIA Certification

When purchasing a diamond engagement ring, especially one with a GIA certification, there are several practical tips and things to be aware of. These tips ensure that you make an informed decision and get the best value for your investment. 

• Tip 1. Understand the 4Cs in Detail Cut: The cut is crucial as it determines the diamond’s brilliance and sparkle. Look for ratings like ‘Excellent’ or ‘Very Good’. Color: Color grades range from D (colorless) to Z (light yellow). Aim for a balance between color grade and your budget. Clarity: Clarity refers to the absence of inclusions. Understand the clarity scale and choose a diamond that appears clean to the naked eye. Carat: Carat weight impacts the size and price. Decide on the carat weight based on personal preference and budget. 
• Tip 2. Scrutinize the GIA Certification: Examine the GIA report closely. Confirm that the report matches the diamond you are considering. The GIA report number should be identical to the inscription on the diamond (if applicable). 
• Tip 3. Assess the Diamond Proportions: Proportions affect a diamond’s light performance. Pay attention to the depth percentage and table percentage, as these influence the diamond’s fire and brilliance. 
• Tip 4. Check for Fluorescence: Fluorescence can affect the appearance of the diamond under certain lighting. Review the GIA report for fluorescence and understand how it might impact the look of the diamond. 
• Tip 5. Compare Similar Diamonds: Compare diamonds with similar 4Cs to understand value and pricing. Use the GIA report to make accurate comparisons between different stones. 
• Tip 6. Look for Laser Inscription: Many GIA-certified diamonds have a laser inscription of the report number on the girdle. This can be used to verify the diamond against its GIA report for authenticity. 
• Tip 7. Consider the Overall Appeal: Beyond the technical specifications, consider the overall beauty and appeal of the diamond. Choose a diamond that speaks to you aesthetically and emotionally.

Now that you’ve got these practical tips, use Jeweler AI below to find the perfect engagement ring that suits your style and budget:

What is GIA Certification? 

Everything you need to know about the GIA’s history, purpose, and regard within the global diamond community, in one place.Sample GIA Diamond Report

Why Trust the GIA?

As mentioned above, a GIA diamond is one that has been formally graded by the GIA.

The GIA represents an independent and unbiased organization that conducts gemstone research, trains gemstone professionals, and sets the standards for determining diamonds’ quality. One of the main functions of GIA is the sorting of diamonds. You may have heard about the diamond grade 4Cs: color, clarity, cut, and carat weight. The GIA developed this standard, along with detailed methodologies for evaluating each “C”, and the classification terminology used to describe them.   

GIA doesn’t mine diamonds, nor does it buy, sell, or trade them. It does not value diamonds and is not otherwise involved in the pricing or valuation of diamonds. GIA operates independently of these commercial interests and ensures that diamond quality assessments are entirely objective and unbiased.  

Why does this matter? Because a number of other organizations offering diamond grading do so for profit and tend to prioritize grading larger quantities of diamonds in much smaller timeframes. Their results are less consistent and tend to grade diamonds much higher than the GIA. As a result, they are favored by chain jewelry stores, which deal with much higher numbers – and lower margins.

If you want to know the quality of the diamond you are considering, and because quality and price go hand in hand, you should look for GIA graded diamonds, and learn how to understand the corresponding GIA reports assessing diamonds.

The History of GIA Certification

The Gemological Institute of America, GIA, was created in 1931 as the need for diamond and gemstone standards arose. Before then, there was an apparent lack of standard when it came to diamond evaluation. Diamond buyers had to trust their jeweler or cutter, whose diamond knowledge might not represent the highest of standards.

The establishment of GIA was a game-changer in the diamond industry. It changed the way both jewelers and the general public would come to know about diamonds. GIA’s founder, Robert M. Shipley, recognized the need for a standardized approach in grading diamonds and gems. He founded GIA as a gemology research institute as well as an education facility where gem knowledge could be shared with the public.

GIA’s mission is to: “Ensure the public trust in gems and jewelry by upholding the highest standards of integrity, academics, science and professionalism through education, research, laboratory services, and instrument development.”

GIA has 14 locations worldwide, in 13 different countries. A GIA certification can be acquired at one of its laboratories around the world.

Key Milestones:

• 1931: Robert M. Shipley establishes the Gemological Institute of America (GIA).
• 1934: The first issue of Gems & Gemology magazine is published.
• 1939: GIA launches the Graduate Gemologist (GG) course.
• 1953: GIA develops the 4Cs diamond grading system (Cut, Clarity, Color, and Carat).
• 1955: The first GIA natural diamond grading report is issued.
• 1970: G. Robert Crowningshield, a leading GIA scientist, highlights the newly developed laser drilling technique used to bleach dark inclusions in diamonds.
• 1976: GIA relocates to Santa Monica, California, due to growth in education and operations.
• 1996: GIA moves to a new campus in Carlsbad, California, for further business expansion.
• 2006: GIA introduces advanced instruments for diamond grading and detection of synthetic diamonds.
• 2007, the GIA issued the first Synthetic Lab Grown Diamond (CVD – chemical vapor deposition) Grading Reports.
• 2020: GIA expands its digital offerings, including online verification tools for diamond certification.

What it Means to be GIA Certified 

The GIA is a highly respected certification and having a diamond certified through the GIA has many benefits. First, the certification offers a reliable grading for the diamond. It also ensures that your diamond has been analyzed by the best in the diamond business and that you’re receiving the diamond quality that is stated on the certificate. It provides peace of mind about your diamond’s authenticity and the high-security measures taken to grade the diamond.

A diamond engagement ring is one of the most important purchases you make. It can also be one of the most expensive. Therefore, you want to be sure that you are getting a reasonable price for the diamond you consider.  

A GIA diamond grading report gives you all the essential information you need to know about a diamond’s 4Cs, as well as its fluorescence, any treatments, and more. With a GIA diamond grading report, you can be sure that your diamond is natural. That’s because GIA has researched and tested the diamond using the most advanced tools and procedures available, based on the Institute’s ongoing scientific research.  

Since a GIA diamond grading report is an unbiased assessment of a stone’s quality characteristics, you can compare one GIA-graded diamond to another. This allows you to compare the quality of loose diamonds and decide which one is the best value and suitable for you. 

Ensuring the diamond you are viewing comes with a GIA diamond grading report is like getting an independent inspection before buying a car or home. It’s a smart step in your buying process – and many insurance companies require a GIA assessment report as the basis for ensuring your diamond. 

GIA grades all shapes of diamonds, and the square princess shape is one of the most popular diamonds for engagement rings.

What is gemology?

In a nutshell, gemology is a discipline that studies gems. But GIA’s GG program goes beyond just learning how to identify gemstones. It covers color science, jewelry coordination, marketing, historical episodes about jewelry, precious metal, and jewelry processing — all of which are essential to understanding jewelry and playing an active role in the industry.

GIA Laboratory Division

GIA Laboratory, the laboratory division of GIA, is a leader in diamond grading, gem identification, and gem material radiation.
The institute investigates and researches most of the world’s most important stones, new imitations, and synthetic jewelry.
The grading and identification technology developed by GIA Labs is a must for the industry and consumers, and important discoveries are frequently incorporated into GIA materials.
GIA Labs also contributes to the international jewelry community through laboratories in New York and Carlsbad.

What are the most common GIA terms you should know?

• Brilliant Cut Diamond
• Certificate
• Clarity Scale
• Diamond Carat
• Diamond Color Grade
• Diamond Cut
• Fluorescence
• Gem Identification
• Gemological Institute of America (GIA)
• Gemologist
• GG (Graduate Gemologist)
• GG Program
• GIA Cert
• GIA Diamond
• Jewelry School
• GIA Research

GIA Certification Process

In the GIA certification process, diamonds are weighed and measured using high-precision tools. Each diamond’s carat weight is measured using an electronic micro-balance for the highest accuracy. Its proportions, including depth, table, and crown angles, are evaluated with an optical scanning device.
Additionally, many GIA-certified diamonds are laser-inscribed with the unique GIA report number, allowing buyers to easily verify the authenticity of the diamond.

Decoding the 4Cs in GIA Reports

The GIA was the first to devise the use of the ‘Four Cs’ as a means of breaking down a diamond’s quality into its most significant parts: Cut, Color, Clarity and Carat (weight).

When received by the GIA, each diamond is analyzed and graded by at least two gemologists based on these four qualities.

• Carat: The first step in the GIA certification process is weighing and measuring the diamond. GIA gemologists use an electronic micro-balance to weigh each diamond to gather the carat weight. They also use an optical scanning device to determine the exact measurement and proportion of the diamond. These devices provide the most accurate measurements of a diamond.
• Clarity: GIA then grades the clarity of the diamond using specialized magnified equipment. The GIA clarity scale consists of 11 grades, ranging from ‘Flawless’ to ‘Included’. The GIA clarity grading system takes in consideration the size, nature, position, color, relief, and quantity of clarity characteristics visible under 10× magnification.
• Color: Color grade is determined by how white or colorless a diamond is. GIA grades diamonds on a letter color scale from D – Z. The less color a diamond has the higher the value it has.
• Cut: A diamond’s cut is an important factor in the GIA grading system, based on its fire, sparkle, and brilliance.

Cut: The Art of Balance

Diamond cut is, inarguably, the most important of the First Cs to get right since it has by far the strongest bearing on your diamond’s brilliance.

The GIA cut-grading scale is based on 7 components: brightness, fire, scintillation, weight-ratio, durability, polish, and symmetry. Each of the 7 components is graded individually, and based on the overall cut of the diamond.

The GIA grades Round Brilliant diamonds according to the following cut scale: Excellent, Very Good, Good, Fair and Poor. In order to create as much consistency and predictability as possible in what is, at heart, a subjective subject, the GIA’s researchers have augmented their research by looking at more than 70,000 diamonds over the period of around 15 years.

The GIA also provides separate grades for Symmetry and Polish, which are given for Round Brilliant diamonds and all other shapes, too. They follow the same scale as the Cut grade, with each subcategory influencing a diamond’s sparkle and value.

It is important to note that a Round Brilliant diamond needn’t be given an Excellent for polish in order to be given an Excellent for Cut. If it scores Excellent in all three areas, however, it is known as a 3X Diamond. 

Color: Shades of Beauty

In clear diamonds, color refers to the extent to which the diamond is impacted by trace amounts of nitrogen, which produces a yellow tint within the stones that varies from very vague (and only visible under magnification) to very obvious. Understandably, buyers want to avoid any visible yellow tint in their diamond.

Again, this represents another category where some discrepancy in opinion is expected, but the GIA’s researchers have ensured the greatest degree of consistency possible is adhered to by its graders.

The scale runs alphabetically from D to Z and is divided into the following subcategories

Colorless	Near Colorless	Faint	Very Light	Light
D, E, F	G, H, I, J	K, L, M	N, O P, Q, R	S, T, U, V, W, X, Y, Z

For any GIA graded diamond, you can be sure that at least two graders have analyzed color independently. An official grade is not recorded until these graders reach an agreement, and the diamond may be examined by additional graders in order for that agreement to be reached.

Clarity: Perfection Under the Lens

A diamond’s most distinguishing features are its inclusions – small, oftentimes microscopic, flaws that occur in the internal structure of the stone while it is still underground that, like birthmarks, make it unique.

But, while these distinguishing features possess their own charm, diamond buyers understandably want to avoid any diamonds bearing inclusions significant enough to infringe on the diamond’s beauty. This is why total transparency around the diamond’s clarity is so important.

Clarity is documented using the following grades:

• FL and IF (Flawless and Internally Flawless)
• VVS1 and VVS2 (Very, Very Slight Inclusions 1 & 2)
• VS1 and VS2 (Very Slight Inclusions 1 & 2)
• SI1 and SI2 (Slight Inclusions 1 & 2)
• I1 and I2 (Inclusions 1 & 2)

Understandably, each clarity grade has a significant impact on the value of the diamond – although some have a greater impact than others, with flawless diamonds (both FL and IF) costing thousands of dollars more than diamonds that are otherwise comparable.

As with color, at least two graders will independently inspect the diamond’s clarity under 10x magnification. Any inclusions, whether microscopic or significant enough to be seen by the naked eye, will be mapped on a diagram within the GIA report.

Carat: Size and Its Significance

Carat refers to the diamond’s weight, rather than its size, with one carat equal to 0.2 grams (or, of course, 200 milligrams). So, a 2.5 carat diamond is the equivalent of 0.5 grams, or 500 milligrams.

A diamond’s weight has a major bearing on its value, with larger diamonds – even those of a lower quality – earning a very high market value. This is particularly true for diamonds that meet the ‘magic weights’ that so many shoppers focus on, such as 1, 1.5, 2, 2.5 and so on. At these weights, even a difference of 0.1 (or less) could mean hundreds of dollars for the vendor.

As a result, any diamond needs to be weighed to an incredibly high degree of accuracy – or its value could be set far too high, or far too low.

GIA graders use an electronic microbalance, which provides an accurate weight to the fifth decimal place.

How GIA Certification Influences Diamond Value

The GIA’s fee for grading diamonds is very inexpensive compared with the cost of the diamond itself, diamonds graded by the GIA are not more expensive than diamonds graded by other bodies.

Again, “GIA Certified” really is a misnomer for GIA diamonds. There is a false idea that GIA diamonds cost more, often based on comparing diamonds based on the price tag without considering their quality.

After all, the price of a diamond, car or other valuable item is linked to quality. If you’re not sure what quality you’re getting, how do you know if you’re overpaying or getting a good deal? Therefore, it is essential to compare prices for diamonds with the same 4C quality characteristics and whose qualities have been accurately and objectively assessed by the same independent laboratory as GIA.   

Having a diamond assessed by GIA is not expensive. GIA charges only $ 48 for a grading report for a 0.70 ct to 0.99 ct diamond, and only $ 80 for a 1.00 ct to 1.49 ct diamond (and, besides, most jewelers include the grading fee in the price of the diamond). Since couples spent an average of $ 6,351 on an engagement ring in 2017, a GIA diamond grading report’s cost is a small price for peace of mind.      

Understanding Your Diamond’s Unique GIA Report

Interestingly, “GIA certified diamond” is a misnomer. GIA does not certify diamonds – it assesses them. The terms “GIA Certified” and “GIA Certificate” are commonly used in the jewelry industry to refer to diamonds that have undergone GIA’s rigorous assessment process, and are now accompanied by an official report created by the GIA’s expert graders.  

GIA itself does not use the word “certificate” to describe the document it issues. The GIA examines the diamond, describes its characteristics, and assesses it according to the 4Cs. It does not certify the diamond or its value. On the contrary, like other science labs, GIA issues a report on the results of the evaluation of a particular diamond and believes that “report” is the correct term to describe the classification results.  

A GIA diamond grading report is essential when buying a diamond. GIA offers reports in several formats, including digital versions, each containing trusted and highly accurate classification information that diamond shoppers can rely on. 

While using the Four Cs is a great way of condensing the most significant features of any diamond into an easily accessible document, there is a little more to finding a great diamond than that – and, within any GIA diamond report, you’ll find a few additional details to help you make your decision.

Alongside the grades for Cut, Color and Clarity, you will find:

• A unique report number, which can be used to verify the authenticity of the report against the GIA’s database.
• A grade for fluorescence.

• Detailed information on the diamond’s proportions: table and depth percentages – vital to picking out a beautiful diamond – as well as length-to-width ratio.
• Laser inscription

The GIA does not offer information on Hearts and Arrows diamonds, nor does it consider ‘Triple X’ diamonds to be an official designation, so you will not find any mention of either of these two features in your GIA report.

Ensuring Authenticity

While it is possible to put together a convincing forgery, it is impossible for anyone to fake a GIA report number, so comparing this unique number against a reliable database will ensure you aren’t duped.

Every diamond that completes the GIA grading system and receives a full assessment of its 4Cs is awarded a GIA certification grading report. This report includes a unique GIA report number, which is laser-inscribed on the diamond for verification. The report itself features security measures like micro print lines, holograms, and a laminated finish to prevent tampering. The final report is placed in a protective sleeve and delivered back to the owner.

While GIA diamonds are not worth more than other diamonds, their reports are considered to be the most reliable and consistent – making them far more attractive investments than diamonds graded by institutions with vested interests, or profits to make.

This is why, on occasion, someone will attempt to fake a GIA report on a diamond that would otherwise be given lower grades, and a lower value. However, as we mentioned above, the GIA’s report numbering system is foolproof, and you needn’t worry so long as you shop from reputable vendors.

Security features to look for include:
Microprinting, security screens, QR codes, watermarks, a two-dimensional barcode, holograms, and unique sheet numbering. These elements are designed to protect the integrity of the report and ensure easy authentication of the document.

GIA Certification Cost

Acquiring a GIA certification for a diamond is not overly expensive. For example, a report for a diamond weighing 0.70ct to 0.99ct costs around $48, while a standard 1-carat diamond certification costs $110. Many jewelers include the cost of certification within the price of the diamond itself, making it an affordable way to ensure that a diamond’s quality has been thoroughly evaluated.

GIA’s Global Influence and Accessibility 

The Gemological Institute of America was founded in 1930s Los Angeles, by a jeweler named Robert M. Shipley. As a jeweler, Shipley had become dissatisfied with the way precious gemstones were dealt with by the industry and, after filling the gaps in his own knowledge, he sought to ensure a high standard of education for other jewelers and gemologists.

The GIA follows a strong code of ethics that ensures an unbiased approach to every single diamond they are asked to grade. They are also committed to furthering research and development, improving the methods and techniques its graders use to ensure the most objective approach to aspects like color and clarity – which, historically, have proven the most subjective – and, ultimately, ensuring a fair and honest approach to the valuation of diamonds.

The GIA now runs multiple campuses across the world, and opportunities for remote learning, as it continues to break new ground in the diamond industry, and maintain a high level of clarity for newcomers and experts alike.

Leaders in Objectivity

The GIA has robust procedures to ensure the anonymity of a diamond and the objectivity of the grading process. This is one of the reasons why the GIA is regarded as the most reliable lab, as it does not show any bias toward vendors.

Upon arrival at the lab, the gemologists keep the diamond in an anonymous transparent storage box without any reference to its owner. Throughout the process, it is tracked using a barcode label. All of these precautions ensure that a GIA assessment report objectively reflects the characteristics of a diamond.  

GIA diamond graders accurately assess the color, clarity, cut, and carat weight of the diamond. More experienced personnel gemologists can review some or all of the information, and provide independent opinions. The official grades are only given once all graders have reached a consensus.

Conclusion

In our opinion, yes, when it comes to making the best possible investment, a GIA report is the strongest guarantee any buyer could hope for.

We’re not saying that you won’t find high quality, beautiful diamonds that have been graded by a different institution, but that the GIA’s efforts to accurately grade each feature are the most painstaking – meaning that you won’t have to worry about overpaying for features or a level of quality that isn’t there.

Buying a diamond is a complex process – one that hinges on transparency, understanding, and the ability to really understand the diamond you’re interested in, even if you’re a total newcomer to the diamond world. This is what the GIA was designed to support, and the most compelling reason for any buyer to focus their search on GIA graded diamonds.

9 FAQs

• Q: What is GIA Diamond Certification? 
• A: GIA certification is a report from the Gemological Institute of America assessing a diamond’s quality based on the 4Cs (Cut, Color, Clarity, Carat) and other characteristics.
• Q: Why is GIA Certification Important? 
• A: GIA certification provides an unbiased, accurate assessment of a diamond’s quality, ensuring that you know exactly what you are purchasing.
• Q: Can GIA Certification Tell Me a Diamond’s Value?
• A: No, GIA certification only assesses quality characteristics. It does not provide a monetary valuation of the diamond.
• Q: How Can I Verify a GIA Report? 
• A: Verify a GIA report using the unique report number provided in the certificate on the GIA website’s report check feature.
• Q: Is Every Diamond GIA Certified? 
• A: Not all diamonds are GIA certified. GIA certification is a voluntary process that not all diamonds undergo.
• Q: What Does GIA Certification Include? 
• A: GIA certification includes detailed analysis of the diamond’s 4Cs, as well as additional information like fluorescence, symmetry, and proportions.
• Q: How Do I Know if a Diamond is GIA Certified? 
• A: Check for a GIA report number inscribed on the diamond’s girdle and verify it with the GIA report provided by the seller.
• Q: Does GIA Certification Affect a Diamond’s Price? 
• A: While GIA certification itself does not directly affect the price, it can influence the perceived value due to the assurance of quality it provides.
• Q: Can I Get a Diamond GIA Certified After Purchase? 
• A: Yes, you can submit a diamond to GIA for certification post-purchase, but it must be unmounted for accurate assessment.

GIA Labs, Campuses and Global Locations

GIA has 12 Labs and 8 campuses in 14 countries worldwide, including:

Campuses:

• Carlsbad, California (World Headquarters)
  • Address: 5345 Armada Drive Carlsbad, CA 92008 United States
  • Phone: +1 760-603-4000
• New York City
  • Address: 115 West 45th Street New York, NY 10036 United States
  • Phone: +1 212-221-5858
• London
  • Address: 100 Hatton Garden London EC1N 8NX United Kingdom
  • Phone: +44 (0)20 7404 3300
• Mumbai
  • Address: GIA India Laboratory Pvt. Ltd. Unit No. 101-107, Trade World, Kamala Mills Compound, Senapati Bapat Marg, Lower Parel (West) Mumbai 400 013 India
  • Phone:+91 22 6749 4000
• Hong Kong
  • Address: Suite 1101-02, 11/F Tower One, Lippo Centre 89 Queensway, Admiralty Hong Kong
  • Phone: +852 2524 2011
• Bangkok
  • Address: 14th Floor, Jewelry Trade Center 919/1 Silom Road, Bangrak Bangkok 10500 Thailand
  • Phone: +66 (0)2 632 4090
• Taipei
  • Address: Room 1001, 10F., No. 218, Section 2, Jianguo South Road Xinyi District, Taipei City 110 Taiwan
  • Phone: +886 (0)2 2700 0098
• Dubai
  • Address: GIA Dubai Suite 1701 The Fairmont Hotel, Sheikh Zayed Road P.O. Box 128428 Dubai, United Arab Emirates
  • Phone: +971 (0)4 332 9965

Labs:

• Carlsbad, California
  • Address: 5345 Armada Drive Carlsbad, CA 92008 United States
  • Phone: +1 800-421-7250 or +1 760-603-4500
• New York City
  • Address: 115 West 45th Street New York, NY 10036 United States
  • Phone: +1 212-221-5858
• Hong Kong
  • Address: Suite 1101-02, 11/F Tower One, Lippo Centre 89 Queensway, Admiralty Hong Kong
  • Phone: +852 2524 2011
• Mumbai
  • Address: GIA India Laboratory Pvt. Ltd. Unit No. 101-107, Trade World, Kamala Mills Compound, Senapati Bapat Marg, Lower Parel (West) Mumbai 400 013 India
  • Phone: +91 22 6749 4000
• Bangkok
  • Address: 14th Floor, Jewelry Trade Center 919/1 Silom Road, Bangrak Bangkok 10500 Thailand
  • Phone: +66 (0)2 632 4090
• Tokyo – GIA Japan
  • Address: 7th Floor, Shin-Tokyo Building 3-3-1 Marunouchi, Chiyoda-ku Tokyo 100-0005 Japan
  • Phone: +81 (0)3 3216 5811
• Osaka – GIA Japan
  • 3F Nagahori Community Building
  • 2-5-8 Minamisenba, Chuo-ku, Osaka, Japan 542-0081
  • Tel: 81-6-6266-8530
• Ramat Gan, Israel
  • Address: Diamond Exchange Complex Building No. 11, 5th Floor Rooms 501-506 Jabotinsky Road Ramat Gan 52520 Israel
  • Phone: +972 (0)3 575 1122
• Johannesburg, South Africa
  • Address: GIA South Africa 1st Floor, West Tower Nelson Mandela Square Sandton 2196 South Africa
  • Phone: +27 (0)11 784 0017
• Antwerp, Belgium
  • Address: GIA Antwerp Hoveniersstraat 22 BE-2018 Antwerp Belgium
  • Phone: +32 (0)3 233 05 11
• Surat, India
  • Address: GIA India Laboratory Pvt. Ltd. 2nd, 3rd Floor, Swastik Universal, Dumas Road, Piplod, Surat 395 007 India
  • Phone: +91 261 6130 600
• Gaborone, Botswana
  • Address: Plot 54351, Block 3, 1st Floor, Fairgrounds Office Park Gaborone, Botswana
  • Phone: +267 395 1111

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