Most people confuse with diamond appraisal and diamond certificate and understand them to be the same. However, there are major differences between the two and it is necessary o understand them.
A diamond certificate refers to a document issued by renowned gemological laboratories certifying a lose diamond, in which its required and appropriate details are included, the details would be regarding the diamond's physical properties at the time of evaluation .The Certificate holds its value over a long period of time, provided the diamond does not get degraded by any mishandling or alteration. The laboratories would not issue a certificate for an already mounted diamond. more
A diamond appraisal is generally used for insurance purpose. Appraisals are often over-estimated, and are therefore poor estimation of a diamond's price. Getting an appraisal from GIA gemologist is often assumed equivalent to getting a GIA Certificate which is not correct. A GIA GTL (Gem trade Lab) Grader is a GIA Employee who performs diamond grading for the institute whereas a GIA Graduate Gemologist has simply passed the GIA Diamonds and Colored Stone Course.
Gemology experts have developed methods of grading diamonds depending on their characteristics most important to their value as a gem. The value of a white diamond is determined by what are commonly referred to as the 4Cs. Four characteristics popularly known as the Four C's are commonly used as basic descriptors of diamond, namely Clarity, Color, Cut and Carat. Each of the 4Cs are important and the most valuable Diamonds are those that possess the best of all four measurements. These 4 Cs are verified by the 5th important C which is Certification.... more
Generally used for insurance purposes, diamond appraisals are incredibly useful in estimating the value of a particular stone, whether loose, mounted or used in jewelry. While the value of a diamond can change considerably over time, the estimate is used as a general guideline to determine the replacement value if it were to be stolen. A Diamond Appraisal is a piece of paper in which an expert diamond appraiser, such as Ritz Diamond Services, completes a series of inspections of the numerous qualities of a diamond to determine the grade of the diamond. Diamond color and clarity, for example, are inspected with sophisticated equipment and the diamond is compared with a number of other diamonds whose characteristics are known and established. Each quality can be measured and the appraiser has a chart of the various grading that can be attributed to each characteristic.
The Gemological Institute of America (GIA) has presented a GIA Diamond Dossier for diamond grading and inscription registry service from GIA Gem Trade Laboratory. This service is for diamonds weighing less than 1 carat on GIA D-Z grading scale. The graded diamonds are inscribed by laser to put a unique GIA report number on its girdle. Buying a diamond for a special occasion means investment of lot of time and money. Therefore, the confidence in buying a best quality diamond is very important. The GIA diamond grading report and GIA Diamond Dossier together provide jewelry industry's most respected..... more
It is important to refer to the certificates issued by GIA (gemological Institute of America) and AGS (American Gem Society) as Diamond Grading Reports. This is an important distinction, one that probably came years after GIA's lab started offering reports. However generally the diamond industry still uses the terms certificate and grading report interchangeably. The term certificate or cert for short. A Diamond Grading Report is a statement, issued by an independent Gemological Laboratory, that at the time of evaluation, the Diamond in question has been examined by experienced Diamond Graders, using various gemological instruments..... more