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Jewellery Advice and Knowledge Jewellery Advice and Knowledge

Jewellery Advice and Knowledge Jewellery Advice and Knowledge

What is the GIA? What is the GIA?

The term 'GIA' crops up a lot when you are looking at diamond jewellery, so we thought it worth explaining exactly what this means!

Who are the GIA?

GIA stands for the Gemological Institute of America, and is one of the many independent bodies responsible for the grading of gemstones. It is most commonly associated with diamond grading, and is the most widely used and recommended institution for diamond certification. Established in the 1930’s, they have played a huge role in the development of technologies for assessment, identification and classification of gemstones. They are also one of the primary sources of education and professional training for gemology related careers and research.

Mr Richard Liddicoat, President of the GIA for 31 years, played a pivotal role in the development of the GIA International Diamond Grading System in the 1950’s. Prior to this, there was no standardisation of terms or concepts to describe diamonds, their quality and their grading. Liddicoat's contributions include the D-Z colour grading system and the Flawless to I3 clarity scale (other certifying bodies may use slightly different terminology, but have very similar systems). At the same time, the GIA also produced the first grading reports in 1953 which became the industry benchmark. They now have laboratories for research, grading and education all over the globe. 

GIA are the most commonly used certification body, as they are widely respected and deemed to uphold the strictest standards. If a diamond is described as, 'GIA certified', that means that the diamond has been assessed and certified in the GIA labs, and a certificate produced. 

If you have a diamond certified by a different gemology laboratory, don’t fear. They use the same technology and assess the same elements of a diamond, but each laboratory may have slightly different standards (so, some may judge a stone more harshly than others). There is, therefore, a chance that the same diamond may be graded slightly differently by two separate labs.

You can read more about the GIA's diamond grading system here, and see examples of their certificates, here.

The term 'GIA' crops up a lot when you are looking at diamond jewellery, so we thought it worth explaining exactly what this means!

Who are the GIA?

GIA stands for the Gemological Institute of America, and is one of the many independent bodies responsible for the grading of gemstones. It is most commonly associated with diamond grading, and is the most widely used and recommended institution for diamond certification. Established in the 1930’s, they have played a huge role in the development of technologies for assessment, identification and classification of gemstones. They are also one of the primary sources of education and professional training for gemology related careers and research.

Mr Richard Liddicoat, President of the GIA for 31 years, played a pivotal role in the development of the GIA International Diamond Grading System in the 1950’s. Prior to this, there was no standardisation of terms or concepts to describe diamonds, their quality and their grading. Liddicoat's contributions include the D-Z colour grading system and the Flawless to I3 clarity scale (other certifying bodies may use slightly different terminology, but have very similar systems). At the same time, the GIA also produced the first grading reports in 1953 which became the industry benchmark. They now have laboratories for research, grading and education all over the globe. 

GIA are the most commonly used certification body, as they are widely respected and deemed to uphold the strictest standards. If a diamond is described as, 'GIA certified', that means that the diamond has been assessed and certified in the GIA labs, and a certificate produced. 

If you have a diamond certified by a different gemology laboratory, don’t fear. They use the same technology and assess the same elements of a diamond, but each laboratory may have slightly different standards (so, some may judge a stone more harshly than others). There is, therefore, a chance that the same diamond may be graded slightly differently by two separate labs.

You can read more about the GIA's diamond grading system here, and see examples of their certificates, here.

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