The institution that Thais rely most on to obtain their certification is the GIA or Gemological Institute of the United States. The GIA has two types of certification, which are a full report or a diamond classification report, which depends on the weight of the diamond. It is used with diamonds weighing more than 1 carat, and the other type, which is a summary report or diamond file from the GIA, which is used with diamonds under 1 carat. Certification of the full report costs more than a summary report.
Along with each diamond you are considering, you must receive and review your laboratory certification. This report or laboratory certificate will be issued by a rating authority and will describe various elements of the diamond, such as color, clarity, length and width. Trained professionals evaluate, examine and measure diamonds using professional tools, such as a magnifying glass or microscope. The European Gemological Laboratory (EGL) is a private organization that offers diamond certification and other gemological services.
It usually includes a detailed analysis of the four C's (cut, clarity, color and weight in carats) of the diamond, as well as other characteristics such as fluorescence, symmetry and polishing. A diamond classification report is a comprehensive evaluation of the quality and characteristics of a diamond, typically issued by a gemological laboratory or certification organization. Diamonds with fewer inclusions and imperfections are generally considered to be of higher quality and value. Both methods involve several steps and professional equipment, so don't try to make diamonds at home on your own.
Buying diamonds can be overwhelming, especially when you don't know exactly what and how to evaluate the diamond. The inconsistency between laboratories makes it difficult to trust the classification and verify the real quality and value of an EGL diamond. This can make them more attractive to buyers and help increase the value of the diamond over time. Diamonds that are completely colorless are considered to be the most valuable, while diamonds with visible yellow or brown tones are less valuable.
In addition to diamond certification, IGI also offers a range of other services, including valuation and valuation services, diamond identification and verification, and education and training programs for professionals in the gem and jewelry industry. Diamonds are generally sold by weight, and larger diamonds are generally more valuable than smaller ones. This can help ensure that your diamond is evaluated by experts who have a deep understanding of diamonds and can provide a full evaluation. GIA is widely recognized as a trusted and reliable source of diamond certification and is respected by gem and jewelry industry professionals around the world.
Let's understand the differences between certified and uncertified diamonds, diamond sorting laboratories, and more.