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Gemological Laboratory Appraisal
A diamond certificate is your blueprint of the diamond you are purchasing and will detail all of the characteristics of the diamond. A full, detailed gemological lab report on the diamond you are buying is your only guarantee of its attributes and therefore also of its value. Independent certification by a reputable and impartial laboratory is your assurance of quality.
What is a diamond Certificate?
 A diamond certificate, gemological laboratory appraisal or grading report, is an official document created by a professional gemologist, trained and qualified in the field of diamonds. Each diamond is evaluated, measured and scrutinized using a 10x jeweler's loupe, 40x microscope, white light, a fixed set of base color stones and other industry tools.
Diamonds are usually graded as loose diamonds for accuracy and a detailed certificate includes details of the carat weight, cut, clarity, color, dimensions, polish, symmetry and fluorescence. Every loose diamond over 0.50ct or diamond jewelry with a diamond of this size purchased at ShireeOdiz.com comes with certification from IGL labs or other specifically specified lab such as GIA, EGL or IGI.
GIA (Gemological Institute of America) is the leading world standard for grading diamonds and GIA graded diamonds are therefore more expensive than any others. The grading scales that we are familiar with today are according to GIA standards.
Diamond Shape | Measurements | Carat Weight | Depth Percentage
Table Percentage | Girdle Thickness | Culet Size | Polish | Symmetry
Clarity Grade | Color Grade | Fluorescence | Comments about Diamond
Plot of Internal and External Inclusions
Why do I need Certification for my Diamond?
Before you purchase diamonds and diamond jewelry online or at a local jeweler's, make sure you know what you want and get what you paid for. The single most important issue is to insist on receiving independent certification from a reputable gemological laboratory. A detailed lab report is the only way to guarantee the accuracy of the diamond grading and purchasing a diamond without a reputable certificate may therefore result in paying more than you should be for overstated, low quality diamonds.
Independent Certification vs. Appraisal Certificate
An appraisal certificate is usually an in-house document, used for insurance purposes, evaluating the estimated retail replacement value of the ring. When purchasing at wholesale prices directly from the manufacturer, this can mean differences between the price you pay and the retail value of up to 300%, meaning savings of up to 70% on retail when you buy direct.
The appraisal certificate will provide general details of the diamond such as the 4 C's, as well as describing the piece of jewelry, its setting and any small diamond or gemstone accents, whereas independent diamond certification will detail the characteristics of the diamond in more detail. Independent certification is also your guarantee that there is no bias with the grading of the quality or weight of the stone and therefore is especially important when purchasing a large solitaire (over 0.50 carat).
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