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Diamond Certificate (LAB)

Diamond laboratories are objective third-parties that independently grade diamonds and produce diamond certificates.

Also known as a "diamond grading report", a diamond certificate is a document in which a gemologist describes the physical characteristics of diamonds and assigns them standardized grades for characteristics such as cut, color, clarity, polish, symmetry and others.

Certificate of diamond is crucial part of diamond trade. Overall, it is a consumers right to be ensured quality of diamond they purchase. Since buying diamond also considered as significant investment, investors or consumers should know that only enormous and premium stones are certified. For instance, diamonds over than a carat weight of 0.50 are certified, below than a carat weight of 0.50 are usually not certified.

Haniken Jewelers NYC provides certified diamonds in all sizes, cuts and colors. Haniken Jewelers NYC also provides diamond warranty for all sizes, cuts and colors.

If you are purchasing a certified diamond, information about its carat weight, cut, color and clarity can be found on a diamond certificate. Listed below are most reliable and reputable Institutions that certify diamonds: The Gemological Institute of America (GIA), European Gemological Laboratory (EGL), Diamond High Council of Belgium (HRD), and American Gem Society (AGS).

The GIA Diamond Certificate

GIA - the Gemological Institute of America - has its Head Office in New York. The Institute was established in 1931 as the non-profit, educational resource for the gem and jewelry industry. Its aim is to provide the industry and the public with an independent, objective opinion regarding the quality of the diamond. Numerous professionals to ensure maximum accuracy and grading consistency carefully check each stone submitted for certification.
GIA developed the first internationally accepted Diamond Grading System with unbiased opinions regarding the quality of polished diamonds by applying uniform criteria to their grading. It also introduced the foremost diamond report, setting the standard for diamond quality documentation around the world.

The GIA's mission is to increase consumers' trust in diamonds and jewelry by upholding the highest standards of integrity, academics, science, and professionalism. They work toward this goal by providing jeweler and consumer education, conducting meticulous research, and developing state-of-the-art laboratory instruments for diamond inspections.

The EGL Certificate

The European Gemological Laboratory (EGL) was founded in Belgium more than 30 years ago. The EGL is committed to protecting the integrity of the jewelry trade and fueling public interest through applied science, innovation, education, and exceptional service.

The EGL is accredited with introducing new approaches to diamond grading, the practice of certifying diamonds measuring less than one carat, and establishing the 'SI3' designation for diamond clarity. The organization is also recognized for conducting advanced research with renowned physicists, geologists, and mineralogists.

The HRD Diamond Certificate

HRD - the Diamond High Council (Hoge Raad voor Diamant) is a non-profit organization at the service of the Belgian diamond trade and industry. The HRD Certificates Department was founded in 1976 to meet the growing demand for reliable diamond certificates.

In 1975, the WORLD FEDERATION OF DIAMOND Bourses (WFDB) and the International Diamond Manufacturers Association (IDMA) appointed a Joint Committee to create an international standard for rules, working methods and nomenclature. By 1976, a comprehensive system of rules and methods was established combining the experience of diamond industry professionals with scientific data.

This Joint Committee is now the International Diamond Council (IDC), which, in 1978, presented the result of all their efforts at the world congress of WFDB and IDMA: the International Rules for Grading Polished Diamonds. This system was unanimously accepted and the HRD Certificates Department works according to these IDC Rules. The HRD Certificates Laboratory has grown into one of the largest diamond certification facilities in the world and enjoys an excellent reputation for objectivity and quality. Each diamond is examined independently by several experts with very sophisticated equipment such as spectrophotometers, Dia-Mention systems, and cathode luminescence apparatus to ensure the high level of reliability.

The AGS Diamond Certificate

Founded in 1943, the American Gem Society (AGS) is dedicated to upholding the highest standards of ethics and integrity in the diamond and jewelry industries. Among the main priorities of the association is top-notch industry education, with numerous courses offered to jewelry professionals and consumers.

In 1996, the AGS established a laboratory to provide modern gemstone grading services for the diamond marketplace. Its conservative, thorough approach to diamond grading has made the AGS one of the world's most respected gemological laboratories.


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