GIA & Their Diamond Grading Process

GIA & Their Diamond Grading Process

GIA & Their Diamond Grading Process

Posted by Sharif Khan on 4th Mar 2021

GIA Diamond Certification

The diamond industry is highly lucrative; one reason why its sanctity and integrity must be safeguarded at all costs. A common challenge that this industry often faces is the infiltration of blood diamonds. Blood diamonds—also referred to as unethically-sourced diamonds—are those that are obtained from war-ravaged countries and are sold primarily to finance insurgencies. Another common challenge the diamond industry faces is inconsistencies in grading reports.

A trader deserves protection from investing diamonds with questionable integrity, against which backdrop the Gemological Institute of America was established. The GIA is an organization that researches, identifies and grades diamonds. Besides, it provides a wealth of resourceful information for would-be diamond traders, most of which is available on the company’s website.

History of the GIA

The Gemological Institute of America was established in 1931, almost ten years after Robert M. Shipley first conceived the idea. In the early 1920s, Shipley was one of the most successful jewelers in the US. However, he was concerned about the unfortunate state of the industry. At the time, there were no professional bodies to set and regulate industry standards, which is why unethical business practices were rampant.

Shipley resolved to bring about the much-required sanity into the industry. He flew to Europe where he took up a gemological correspondence course in the Great Britain National Association of Goldsmiths. He then traveled back to Los Angeles and started a preliminary training program in gemology on 16 September 1930. The primary mission of this program was to train and certify jewelers.

Shipley reckoned that by doing so, dishonest merchants would be done away with. All certified jewelers maintained close ties, assembling and forming a national jewelers’ guild that sought to offer professional jewelry services to diamond buyers. Instead of the traditional sales-based approach, merchants began focusing on providing invaluable information to their buyers. The term “certified gemologists” was also born on account of this newly developed conduct. Diamond buyers were keen on trading with duly certified jewelers, and this is how the GIA was established.

The GIA’s main objective is to set and maintain the standards used in the evaluation of gemstone quality. Presently headquartered in Carlsbad, California, the association aims to protect both diamond buyers and sellers from illegal business practices. It boasts 11 campuses and 4 research centers; all spread across 13 countries. Besides, the GIA has up to 9 laboratories dedicated to diamond testing and grading.

James Allen

Significant Milestones in the History of GIA

1931 – The GIA is established.

1937 – The company patents the first gemological microscope; a historic milestone that allows gemologists to examine their gems more closely.

1953 – The GIA coins the Four Cs that continues to remain a globally-recognized formula used to determine the quality of diamonds.

1955 – The company issues the first grading reports that subsequently received worldwide recognition.

1956 – The association devises an ingenious way of detecting such diamonds as are irradiated for color enhancement.

1960 – The company publishes the first diamond dictionary; another significant milestone for aspiring gemologists.

1987 - The Liddicoat Gemological Library & Information Center becomes the first library to amass the highest number of books on gemology.

1991 – In line with the GIA’s social corporate responsibility, the company hosts its first Career Fair.

1999 – The GIA introduces HPHT treatment in the diamond industry. The industry can now use this high-pressure high-temperature technique to establish the value of decolorized diamonds.

2003 – The firm invents a technology used to detect sapphires that are made using beryllium-diffusion techniques. Besides, the company is also now able to identify diamonds that are made from chemical vapor deposition.

2005 – The GIA comes up with a method for grading the round brilliant diamond cuts using the D-to-Z color range.

2007 – The organization introduces the Synthetic Diamond Grading Report, making it easy to establish the quality of lab-grown diamonds.

2014 – It comes up with Diamond Check technology through which traders can distinguish between natural and synthetic diamonds.


The GIA Diamond Grading Process

1. Research

As mentioned already, the GIA primarily conducts research on diamonds and the area of gemology at large. The lion’s share of the studies is focused on diamond identification and strives to help traders around the world distinguish between real and synthetic diamonds, especially when such a distinction is impossible to make with the untrained eye.

The GIA also advances research on the various other aspects of diamonds, and after introducing the concept of the Four Cs, it did not stop there. It continued to investigate other elements of diamonds, such as fluorescence, all in a bid to establish the right methodologies for determining diamond quality. Besides spearheading research on diamonds, the GIA also researches on rubies and sapphires. Click here to learn more about the company’s ongoing research projects.

2. Education

In addition to research, the GIA also offers holistic education programs. The company has 12 campuses around the world, though most courses are offered online via an interactive eLearning model that renders the online programs nearly as practical as the on-campus ones. The GIA campus-based programs are accredited by the Accrediting Commission of Career Schools and Colleges (ACCSC). Moreover, the online programs are accredited by the Accrediting Commission of the Distance Education and Training Council (DETC).

One notable course that the company offers is the Graduate Gemologist diploma. Some of the skills that can be learned under this program include:

  • Jewelry design,
  • Casting,
  • Mold making,
  • Wax carving, and
  • CAD/CAM.

The program covers the full spectrum of how diamond processing works, from exploitation at the mines to production at the factories. The various aspects of diamonds and how those aspects influence the latter’s quality are also covered therein. Also, there are units on how to use gemological equipment safely and effectively.

Upon completion, participants of the course receive the Graduate Gemologist diplomas, besides the Graduate Colored Stones and the Graduate Diamonds diplomas. They are considered certified gemologists at this point and can become any of the following industry members:

  1. Jewelry Merchant,
  2. Pawnbroker,
  3. Diamond Sorter/Grader,
  4. Diamond Appraiser,
  5. Diamond Auction Specialist,
  6. Inventory Control Specialist,
  7. Estate Jewelry Dealer, and
  8. Gemological Lab Technician.

The best part is that professionally trained and certified gemologists administer the courses. Apart from these two learning models, the GIA also provides corporate training programs. Follow this link to apply.

3. Manufacture of Gemological Instruments

The GIA designs and manufactures diamond grading instruments that can be used by any diamond merchant to determine both the physical and optical characteristics of diamonds.

To maintain the industry standards, the association is selective regarding whom it sells the appliances. A diamond dealer must be reputable enough to order these tools, examples of which include a 10x eye loupe, gem clothes, and tweezers. Besides, a dealer can also grab hold of sophisticated equipment such as spectroscopes and microscopes. Visit the GIA store to sample some of these high-end gemological apparatuses.

4. Laboratory Services

Laboratory facilities are also some of the GIA’s flagship services. The organization offers professionally prepared diamond grading reports that typically analyze the four parameters—cut, carat weight, color, and clarity—used to determine the quality of diamonds. Usually, there are two types of reports: (1) the Diamond Dossier report that is a less-thorough, less expensive version of the detailed report and (2) the comprehensive report known as the Diamond Grading Report.

If possible, always go for the detailed report because it analyses the various elements of the diamond in detail. The Diamond Grading Report will highlight the specific carat weights in the stone and specifies its color, country of origin, and cut. Above all, the report will state if the stone has any inclusions. Remember, a diamond may look all eye-clean but there could be way too many inclusions that ultimately affect its clarity score. A GIA report seeks to highlight the details that would otherwise escape the attention of the undiscerning buyer.

In most jurisdictions, a seller must issue their buyers a Diamond Grading Report for any sale of 0.5 carats or over; a buyer ought to insist on getting the report even if a purchase is lower. A merchant that issues a GIA Grading Report is likely to be reputable.

Why GIA Certificate?

The GIA is a non-profit organization and works independently. This means that there is no interference from the government, other gemological agencies, or diamond merchants. When seeking expert opinion on diamonds or gems in general, prefer a company that works independently, which will guarantee that there is no conflict of interest. Since, as mentioned before, the GIA is not a profit-seeking organization, the services that it offers are primarily geared towards helping diamond traders.

The company has set and maintained high standards in the industry, mainly due to these two factors. It does not matter whether one is a diamond dealer seeking to have their diamonds certified or a diamond buyer looking for appraisal services, their best bet is to consult the GIA.

Besides being an independent and a not-for-profit agency, another factor that makes the GIA stand out from most gemological institutes is the massive resource of information. The company seeks to educate members of the public on all matters that pertain to diamonds. To that end, the GIA runs rigorous outreach programs through periodical publications, one example of which is Gems & Gemology.

Additionally, the organization runs an online Gems Encyclopedia that contains many of the terms commonly used in the world of gemology. Whether considering taking up a course in gemology or trying to start up a diamond store, one can invest in the Gems Encyclopedia to learn about some basic terms and jargon used in the industry. Some of the terms the encyclopedia tries to explain include the different diamond cuts.

If based in Carlsbad, the Richard T. Liddicoat Gemological Library & Information Center might be a go-to resource center. The center is still the world’s largest and most diverse gemological library and houses over 38,000 books, 700 international magazines, 80,000 digital images, 1,000 videos/DVDs, and 300 maps. Besides, the library features over 6,000 original jewelry-design renderings. Most of these works are older than the library itself. What is more, the center has reference staff who are always happy to answer every diamond-related question.

Indeed, the GIA is a trailblazer in initiating and fostering the best practices in the diamond industry. Visit this link to check if they have a location nearby. Click here to contact them for any queries and clarifications on diamonds and gems in general.