Jewelry and Gems The Buying Guidebook: Diamond Grading Report

Today, few fine diamonds over a single carat are sold without a diamond grading report, or certificate, as they are called, from a respected laboratory. Reviews issued by the GIA/Gem trade lab are most widely used in the United States and many nations around world.
A grading report does more than clarify the stone’s genuineness, it fully describes the stone and evaluate each of the essential factors affecting quality, beauty, and value. Grading reports can be very useful for a variety of reasons. The information they include can provide verification of the “facts” since represented by the seller and enable one to make a safer decision when purchasing a diamond. Another, important functionality of reports is to verify the identity of a specific diamond a few future time, if, for example , it has been out of one’s possession for any cause. For insurance purposes, the information supplied on the report will help ensure replacement of a lost or stolen gemstone with one that is truly “compatible high quality. ”

Reports are not necessary for each diamond, and many beautiful diamonds utilized in jewelry are sold without them. Nevertheless considering the purchase of a very great diamond weighting one carat or more, we strongly recommend that the diamond become accompanied by a report, even if it means using a diamond removed from its setting (no reputable lab will issue a report on a mounted diamond), and then reset to zero. If you are considering a diamond that will lacks a report, it is easy for your own jeweler to obtain one. Or, now that GIA is issuing diamond grading reports to the public, you may submit a diamond at GIA your self.

Do not rely on the report on your own

The availability and widespread use of diamond grading reports can, when properly understood, enable even those with out professional skills to make valid evaluations between several stones, and thus create more informed buying decisions. Reviews can be an important tool to help you understand differences affecting price. But we must caution you not to let them hinder what you like or really want. Remember, some diamonds are very beautiful even though they will not adhere to establish standards. In the last analysis, use your own eyes and enquire yourself how you like the stone.

A client who was trying to decide between many diamonds. Her husband wanted to buy her the stone with the greatest report, but she preferred another stone which, according to what was within the reports, wasn’t as good. They decide against the best diamond and bought the one that made her happiest. The important thing is that they knew exactly what they were purchasing, and paid an appropriate price for your specific combination of quality factors. Quite simply, they made an informed choice. The reports gave them assurance as to the facts, and greater confidence which they knew what they were really evaluating.

Improper use of reports can lead to pricey mistakes

As important s diamond grading reports can be, they can become misused and lead to erroneous conclusions and costly mistakes. The key in order to being able to rely on a diamond statement, and having confidence in your decision, lies in knowing how to read it correctly. For example , when trying to decide among two diamonds accompanied by diamond grading reports, buyers all too often make a decision simply by comparing just two factors examined on the reports, color and clearness, and think they have made an audio decision. This is rarely the case. Nobody can make a sound decision based on colour and clarity alone. In fact , whenever significant price differences exists among two stones of the same colour and clarity as the more expensive rock, and often it is not the better value. Getting the same color and clarity is only part of the total picture. Differences in cost indicates differences in quality, differences you might not see or understand. With round diamonds, the information you need is around the report, but you need to understand what all the details means before you can make valid reviews.

A word of caution: Do not make a purchase relying solely on any report without making sure the survey matches the diamond, and that the particular diamond is still in the same situation described. Always seek a professional gemologist, gemologist-appraiser, or gem-testing laboratory to verify that the stone accompanying report is definitely, in fact , the stone described generally there, and that the stone is still in the same condition indicated on the report. There are instances where a report has been accidentally sent with the wrong rock. And, in some cases, deliberate fraud can be involved.

How to read a gemstone grading report

Check the date issued. It is very important to check the date around the report. It’s always possible that the diamond has been damaged since the report has been issued. This sometimes occurs along with diamonds sold at auction. Since precious gems can become chipped or cracked along with wear, one must always check them. For example , you might see a diamond accompanied by a survey describing it as D – Flawless. If this stone were terribly chipped after the report was issued, however , the clarity grade can easily drop to VVS, and perhaps, much lower. Needless to say, in such a case value would be dramatically reduced.

Who issued the report? Check the name of the lab issuing the report. Is the statement from a laboratory that is known plus respected? If not, the information on the report may not be reliable. Several well-respected laboratories issue reports on diamonds. The very best known in the United States include the Gemological Company of America Gem Trade Lab (GIA/GTL or GIA), and the American Gemological Laboratories (AGL). Respected Western labs issuing reports include the Belgian Diamond High Council (HRD). Regardless of which report you are reading, all will provide similar information, including:

Identity of the stone. This verifies how the stone is a diamond. Some gemstone reports don’t make a specific statement about identity because they are called gemstone reports and are only issued to get genuine diamonds. If the report is not called a “diamond grading report” then there must be a statement attesting that it is genuine diamond.

Weight. The precise carat weight must be given.

Proportions. Any diamond, of any form, should be measured and the dimensions recorded as a means of identification, especially for insurance/identification purposes. The dimensions given on the diamond report are very prices and provide information that is important for several reasons. First, the dimensions can help you determine that the diamond being examined is, in fact , the same diamond described within the report, since the likelihood of having two diamonds with exactly the same carat weight and millimeter dimensions is remote control. Second, if the diamond has been damaged and re-cut since the report has been issued, the millimeter dimensions might provide a clue that something has been altered, which might affect the carat fat as well. Any discrepancy between the dimensions that you or your jeweler manage measuring the stone, and those offered on the report, should be a red flag to check on the stone very carefully.

Finally, the particular dimensions on the report also inform you whether the stone is round or even out of round. Out of round diamonds sell for less than those that are more perfectly round.
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Fine diamonds are “well-rounded”.

The diamond’s roundness will affect value, so it is determined very carefully from measurements of the stone’s diameter, gauged at several points around round the circumference. For a round diamond, the report will usually give two diameters, measured in millimeters and noted to the hundredth: for example , 6. fifty-one rather than 6. 5; or six. 07 rather than 6. 0. These indicate the highest and lowest diameter. Diamonds are very rarely perfectly circular, which is why most diamond reports will certainly show two measurements. recognizing the rarity of truly round diamonds, some deviation is permitted, as well as the stone will not be considered “out of round” unless it deviates simply by more than the established norm, around 0. 10 millimeter in an one carat stone. In an one carat diamond, if the difference is 0. 10 or less, then the rock is considered “round. ” If the distinction is greater, it is “out-of-round. inch

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