On most new gia certificates and selectively on some other certificates this number is laser inscribed in the diamond s girdle and can be easily verified with a magnification loop.
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The 5 leading diamond certification organisations issue a unique number for every diamond to protect the consumer.
Unfortunately many jewelry stores try to sell diamonds with igi egl grading reports to their customers.
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Gia stands for gemological institute of america as is widely considered as the standard bearer of the diamond certification industry.
A diamond certificate will not place a dollar value on your diamond.
The cost of certification depends on the laboratory used and the size of the diamond but you should expect to pay between 100 300 for most stones.
The ags american gem society prides itself on being the original lab to provide diamond cut grades.
If you re looking to get your diamond certified you need to approach a professional gemological laboratory which will grade your stone accurately.
A certificated diamond will come in at a premium when compared to a diamond the same quality but without a certificate.
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Everything that the gia does is focused on education whether it s for the consumer or the jeweler.
Apart from the 4cs of a diamond carat weight cut color and clarity a diamond certificate is considered to be the fifth c.
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Gia is the world s most trusted name in diamond grading and gem identification.
With objectivity and expertise as its hallmarks gia ensures the integrity and accuracy of every report it issues.
Such a diamond would be worth much more because the color and clarity grades are better than what gia ags would rate.
For instance a diamond graded as si1 in clarity and h in color by gia ags could be vs1 in clarity and f in color for igi egl.
Gia tests every material submitted to determine whether it is natural or not and discloses any.
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