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Today some fine diamonds over one carat are sold without a diamond grading report or certificate, as they are called, from a reputable laboratory. Reports of the GIA / Gem Trade Laboratory issued most frequently in the United States and many countries around the world. A grading report is more than clarification of the stone authenticity, it fully describes the stone and evaluate each of the critical factors of quality, beauty and value. Grading reports can be very useful for a variety of reasons. The information contained in it can provide verification of "facts" as presented by the seller and allow it to make a safer choice when buying a reporting diamond. Another important feature of the reports is to verify the identity of a particular diamond at a later date if, for example, it has been from his possession for any reason. For the insurance, the information on the report made available to ensure replacement of a lost or stolen diamonds with one that really "compatible quality."

Reports are not necessary for all diamonds, contrôle de gestion and many beautiful diamonds used in jewelry, without selling it. But when you purchase a very fine diamond weights one carat or more, we strongly recommend that the diamond is a report to be attached, even if it with a diamond from its surroundings (no reputable laboratory is removed, a report on a provided topic is diamond), and then reset. If you are considering a diamond, a report is missing, it is easy to get for your jeweler to one. Or can, now, GIA diamond grading reports, the exhibition to the public, you can leave us a diamond with GIA not report alone

The yourself.

Do on the availability and distribution of diamond grading reports, when understood properly, so even those without meaningful knowledge to make comparisons between several stones, and thus more informed purchasing decisions. Reports can be an important tool to help you understand its differences affect price. But we must be careful not to let one of them, interfere with what you like or really want. Remember, some very nice diamonds, even if they do not adhere to establish standards. In the final analysis, you use your own eyes and ask yourself how you like the stone.

A customer who is trying to decide between several diamonds was. Her husband wanted to buy the stone with the best report, but they pulled another stone, which according to what the reports, was not so good. You decide, against the best diamond and bought the one that made her happiest. The important thing is that they knew exactly what they bought, and paid a fair price for the specific combination of quality factors. In other words, they made an informed choice. The reports gave them certainty about the facts, and more confident that they knew what they can really comparing.

Improper use of the reports lead to costly mistakes

As important s diamond grading reports, they can also be abused and lead to incorrect conclusions and costly mistakes . The key to being able to rely on a diamond report, and confidence in your decision lies in knowing how to read it properly. For example, if one tries, between two diamonds by diamond grading reports accompanying decide buyers too often evaluate a decision by comparing only two factors, to the reports, color and clarity, and think they have made a good decision. This is rarely the case. No one can make an informed decision about the color and clarity alone. In fact exists when there are significant price differences between two stones the same color and clarity as the more expensive stones, and it is often not the better value. Following the same color and clarity is just one part of the picture. Price differences are differences in quality, differences that can you not see or understand. Set with round diamonds, the information you need on the report, but you need to understand what all the information before you can make valid comparisons of means.

A word of caution: Do not make a purchase solely on each report without the report is consistent with the diamonds and the diamond still described in the same state. Always seek a professional gemologist gemologist appraisers, or gem-testing laboratory to confirm that the stone of the accompanying report is, in fact, the stone described there, and that the stone is given in the same state on the report . There are cases where a report is sent by mistake to the wrong stone. And in some cases willful fraud involved.

How a diamond grading report is read line break line break line break line break check the time of publication. It is very important to check the date on the report. It is always possible that the diamond has been damaged since the report was issued. This happens sometimes with diamond auctioned. Because diamonds can be chipped or cracked with wear, they always have to check. For example, you might see a diamond with a report describing it as D accompanied - Flawless. If this stone were badly hit after the report was published, but could easily fall VVS clarity grade, and in some cases significantly lower. Needless to say, would be reduced drastically in such a case value.

Who gave the report? Check the name of the laboratory issuing the report. Is the report from a laboratory that is known and respected? If not, the details of the report is not reliable. Several well-respected laboratories issue reports on Diamonds. The best known in the United States, the Gemological Institute of America Gem Trade Laboratory (GIA / GTL or GIA) and American Gemological Laboratories (AGL) are. Prestigious European laboratories published reports, the Belgian Diamond High Council (HRD) are. Regardless of which report you just read, all offer similar information, including: line break line break line break line break identity of the stone. This confirms that the stone is a diamond. Some reports are not diamonds a certain statement about identity, because they are called diamond reports and are issued only for the real diamonds. If the report is not called a "diamond grading report" is then seen to be a statement that it is diamond.

Weight real. The exact carat weight will be given.

Dimensions. Every diamond in any form, and to measure the extent included as a means of identification, especially for insurance / identification. The dimensions of a diamond are very price report and provide important information for several reasons. First, the dimensions can help you determine that the diamond checked, in fact, diamond is the same described in the report, since the probability that two diamonds with exactly the same carat weight and dimensions of a millimeter away. Secondly, if the diamond has been damaged and re-cut, since the report was published, the millimeter dimensions provide a clue that something was changed, which may affect the carat weight as well. Any discrepancy found between the dimension that you or your jeweler to get through the measurement of the stone, and those available on the report should be a red flag to examine the stones very carefully.

Finally, the dimensions of the report also tells you whether the stone is round or not round. Of round diamonds for less than those who are more perfect round.

Fine diamonds are "well rounded".

The diamonds roundness value is impaired, so it is very carefully determined from measurements of the diameter of the stone is estimated to sell at several points around circumference. For a round diamond, the report will usually be two diameters measured in millimeters and recorded to the hundredth, for example, 6.51 instead of 6.5, or 6.07 instead of 6.0. These show the highest and lowest diameter. Diamonds are very rarely perfectly round, why are most of the diamonds, reports show two measurements. Recognition of the rarity of diamonds is really round, some deviation is allowed, and the stone will not be as "untrue", provided that not more than the established norm, about 0.10 millimeter in a different carat stone. In one carat diamond, if the difference is 0.10 or less, then the stone as "round". If the difference is greater, it is "out-of-round."

To calculate an acceptable variation on a particular stone, the average of the high and low diameter dimension given and multiply that number by 0.0154. For example, if the specified dimensions 8.20x 8.31, the average diameter of 8.25 ((8.20 + 8.31) / 2). Multiply 8.25 by 0.0154 = 0.127. This is the maximum deviation allowed for this stone (0.12 to 0.13). The actual difference in this example would be 0.11 (8.31 to 8.20), well within the tolerance, so that these diamonds would be a "round". Flexibility for diamonds over two carats.

Depending the degree of out-of-roundness (how much is it from being perfectly round differs from above) are permitted, the prices are influenced. The greater the deviation, the lower the price should be be.

Dimensions not for fancy shape line break line break line break line break while dimension for fancy shapes diamonds as important as they are for round diamonds, there are of length to width ratios, the "normal" and variations Price reductions can result. Reflect the following acceptable ranges:

Pear Shape: 1.50:1 1.75:1 to

Marquise form: 1.75:1 to 2.25:1

Emerald form: 1.50:1 1.75:1 to line break line break line break line break oval shape: 1.50:1 1 understanding of 75:1 to

To better what this means, let's look look like a marquise diamond as an example. If their report showed the length to 15 millimeters and 10 millimeters in width to the length-width ratio of 15 to 10 or 1.5:1 would be. This would be acceptable. However, if the dimensions of 30 mm and 10 mm long were wide, the ratio would be 30 to 10, or 3:1. This would be unacceptable, the ratio is too large, and the result is a stone that looks much too long, its width. Note: A long Marquise is not necessarily bad, and some people prefer a longer form, but it is important to understand that such stones should sell for less than those with normal lengths. Always keep in mind the length to width ratio of fancy cuts, and set the price for not acceptable in the dosage of range.

Evaluating report

As already mentioned, is a good dosage to be crucial for diamonds, as the man or woman who wears them! The dosage, especially the depth percentage and table percentage, s determines what, how have the brilliance and fire stone.

The information provided on diamond reports with regard to proportions is of crucial importance for round diamonds. Unfortunately, there is only minimal use of fancy with fancy diamonds. For fantasies, you must learn to relate to the eye, whether the dosage is acceptable Reliability: Are there differences in brightness over the stone? Or flatness? Or dark spots such as "bow-tie" which is from poor proportioning.

Evaluating the dosage of a diamond as important as the assessment of the color and clarity grades. Diamonds that are cut close to "ideal" proportions, with bricks "very good" is simply more expensive than the norm, while making diamonds with poor sell for less, very poorly proportioned stones should be much less for be favorable. The information on a diamond report can help you know the dosage and whether or not, should you pay more, or less, diamond.

Depth for a certain percentage and table percentage determine beauty

To key to whether a round stone of dosage, their beauty is so critical, well, look at the section of the report that depth percentage and table percentage describes. The depth percentage is equal to the depth of the stone, the distance from the table, around the culet, expressed as a percentage of the width of the stone. The table shows the percentage width of the table as a percentage of the width of the entire stone. These figures show how well a round stone was cut in its dosage, and must comply with very accurate. Your eye may be able to see differences in brightness and brilliance, but you may not be able to recognize the subtleties of the dosage. The percentages refer to the report should fall in a fairly specific area in order for the stone to award judged to be acceptable, or poor.

Some reports also contain information about the crown angle. The crown angle tells you at what angle the crown part was cut off. This angle will affect the depth and table percentage. Normally, when the crown angles between 34 and 36 degrees, the depth chart and will be excellent, between 32 and 34, good, 30-32 degrees, fair, and less than 30 degrees, poor. If the exact crown angle is given, it is probably regarded as acceptable. If not, there is a statement that crown angle exceeds 36 degrees, or less than 30 degrees.

Depth percentage

A round cut diamond with a depth percentage of 58-64 percent is usually a beautiful, vibrant stone. However, you should note that belt thickness will affect depth percentage. A high percentage of depth could result in a thick or very thick belt, related as in depth review on the Diamond report, check the belt as well as information. be linebreak linebreak stones with a depth percentage of 64% or below 57% usually too deep or too shallow to have maximum beauty and should sell for less. If the depth percentage is too high, the stone look will show less than the weight. If the depth percentage is unusually high, brilliance will be significantly affected. Diamonds, which are so flat, that is, rocks with as little depth percentages that they have no brilliance and vibrancy. If dirty, look like stones no better than a piece of glass.

We avoid diamonds with depth percentages above 64% or below 57%. If you're dressed like diamonds, remember that they sell for much less per cut carat.

Table Percentage

Round diamonds with tables of 53% - 64% lead in generally fine, living stones. Diamonds with smaller tables and generally show more fire than those with larger tables, but tables can have larger stones with greater brilliance. As you can see, table width of the diamond affects the personality, but the decision as to which personality is more desirable is a matter of personal taste.

Finish

Under diamond finish on the report you will find an evaluation of the diamond polish and symmetry. Poland serves as an indicator of the care taken by the knife. The diamond quality of the polish is a factor that can not be ignored in evaluating the overall presentation quality of a diamond, and the costs and benefits. Polish can be referred to the report as excellent, very good, good, fair, or poor. The price per carat of diamonds should be less "fair" or "bad" to polish. Cost per carat is usually more for diamonds, the "very good" or "excellent" are Polish. Symmetry describes several factors:

whether or not the facets of one side of the diamonds correspond to corresponding facets on the opposite side;; How to align the facet edges together whether or facets in the upper part of the diamond are properly aligned with corresponding to the lower part. line break line break line break line break when the symmetry is "fair" or, worse yet described, is somewhat out of line. linebreak linebreak when evaluating symmetry, the most important area to check is the alignment of the crown (top) to the pavilion (bottom). If it is not good, it is a visual difference in the beauty of the stone, and accordingly in its price class. To check for proper alignment here simply align the diamond from the side to see if the facet just above the belt with the facets of girdle.

When directly under the upper and lower facets not stand in line, there are sloppy cutting and, more importantly, reduced the overall beauty of the diamond. This will reduce the price more than other symmetry faults.

How will continue to impact the value Belt?

The belt is another important item on diamond grading reports has described. The report will show if the girdle is polished or faceted, and how thick it is. Girdle thickness that is very important for two reasons: value and impact

It It affects the durability of diamond. Girdle thickness ranges from extremely thin, extremely thick. Diamonds with belts that are too thin or thick, usually for less than other diamonds for sale. An extremely thin belt increases the risk of spalling. remember that, despite its legendary hardness, diamonds are brittle, so very thin edge, a larger risk.

If a diamond has an extremely thick belt provides, its costs should be reduced somewhat, because the stone will look smaller than another diamond of the equal weight with a normal belt thickness. This is because the extra weight is consumed by the thickness of the belt itself is. linebreak linebreak there are some cases where a very thick belt is acceptable. Forms, the one or more points, such as the pear shape, marquise or heart, may have thick or very thick belt near the points and still in the acceptable range. Here is the additional thickness in the belt protects the points from chipping.

Generally, a diamond increases with an extremely thin girdle sell for less than one with an extremely thick belt because of diamonds susceptibility to chipping. However, if the belt is too thick (as in older diamonds), the price may be significantly less because the stone cam much smaller than other diamonds of comparable weight.

The Culet

The culet glance looks like a dot at the bottom of the diamond, but there is usually another facet, a tiny, flat surface polishing. This facet should be small or very small. A small or very small culet not noticeable from the top. Some diamonds are now pointed. This means that there really is no culet that the stone was cut straight down to a point instead. The larger the culet, the more visible it will form the top. The more visible, the lower the cost of the diamond. Diamond describes how large or "open" culet in old European and old mine diamonds are less desirable because the culet causes a reduction in the appearance of shine or gloss in the center of the stone. These stones are cut in the new rule, and its price should accept the need for re-cutting. For the same reasons, one is troubled or broken culet seriously detract from the beauty of stone and substantial reduction of cost.

Clarity

The color and color and clarity grades on a diamond report, the items most people are familiar with. They are important factors in relation to determining the value of a diamond, but is shown as the preceding discussion, they do not tell the whole story about the word on diamond.

A fluorescence

Fluorescence, if present, must also appear on a diamond grading report. It will be graded low, medium, be strong or very strong. Some reports indicate as to the color of the fluorescent blue, yellow, white, and so on. If fluorescence is moderately to very strong and the color is not specified, you should ask the jeweler to tell you what color the stone fluoresces. A stone with strong yellow fluorescence should sell for less because it appears more yellow than it really is, when worn in daylight or fluorescent lighting. The presence of blue fluorescence is not affected and in some cases can be considered a bonus, because it can make the stone appear more white than it really is in daylight or fluorescent lighting. However, if the report shows a very strong blue fluorescence, it is an oily or milky appearance of the diamond. If the stone is milky or oily you how you look at it, especially in daylight or fluorescent tubes, it should sell for less.

Be sure to specify the full picture clarity provided

The placement, number, type and color of the internal and external error on a diamond grading report, a conspiracy, all d plot details. Be sure to carefully note all details in addition to the overall score. Think about it affecting the placement of reliable diamond grading report value.

A imperfections are not issued to a fracture-filled diamond, so GIA and most other laboratories do not report on diamonds, clarity has been improved with this method. The diamond will not be evaluated with a note that it is filled, and can be returned. The reports on diamonds, clarity enhanced laser were issued. Not but remember that no matter what the clarity grade a lasered diamonds should cost less than others with the same grade.

A last word about diamonds report line break line break line break line break diamond grading reports provide a very useful tool in comparing diamonds and assessment of quality and value to support. But the key to their benefit is proper understanding of how to read them, and how to look at the stone. Those who take the time to learn and understand what they read, and therefore what they are buying really have a big advantage over those who do not.

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