What is a GIA diamond ?
As mentioned above, a GIA diamond is really shorthand diamond sellers use to describe diamonds that have been graded by GIA. GIA is an independent, nonprofit organization that conducts gem research, educates gem professionals and sets the standards for determining diamond quality. One of GIA’s main functions is the grading of diamonds. You may have already heard or learned about the 4Cs of diamond quality: color, clarity, cut and carat weight. GIA created this standard, along with the scientific procedures for evaluating each “C” and the grading terminology used to describe them.
GIA does not mine diamonds, nor does it buy, sell or trade them commercially. It doesn’t appraise diamonds and is not otherwise involved in diamond pricing or valuation. GIA operates independently of these commercial interests, ensuring that its diamond quality assessments are completely objective and unbiased.
If you want to know the quality of the diamond you’re considering – and you should, because quality and price go hand in hand – then you should look for GIA-graded diamonds and the GIA diamond grading reports that will accompany them.
What does it mean for a diamond to be a “GIA certified diamond”?
“GIA certified diamond” is a misnomer. GIA doesn’t certify diamonds – it grades them. The terms “GIA certified” and “GIA cert” are commonly used in the jewelry industry to refer to diamonds that have undergone GIA’s rigorous grading process and to the reports that accompany them.
GIA itself does not use the word “certificate” to describe the document it issues. GIA examines the diamond, assesses its qualities based on the 4Cs, and describes it. It does not certify the diamond or its value. Rather, like other scientific laboratories, GIA issues a report on the results of its evaluation of a particular diamond and believes “report” is the appropriate term to describe its grading results.
Diamond with 1ct up will have a longer and more detailed information on GIA certificate.
Dossier diamond below 1ct GIA certificate