http://www.aaa3.net/diamond-rating-scale-ags/
Advanced Diamond Tutorial by Emma Parker & Co. Chapter 3
Diamond Cut: The Basics – Understanding the Technology
Chapter 3
To understand the different measurements, tests and assessments are made through diamonds, and what the results of these tests means diamonds in performance visual, it must first have a solid understanding of technologies and techniques used to obtain such data.
There are many different tools which are used by gemologists and diamond qualifiers to determine the facts about a diamond properties. This section will focus mainly on more complex and least understood tools, and will focus primarily on the tools used to determine the cut and light performance.
Without Contact Scanners
The Sarin machine is the most popular device in a small group of machines called "measuring devices no contact ". These tools are, in essence, scanners that scan the external surface of the diamond and measure all flat surfaces of the stone. They do this by adopting many 2-D images of the shape of the diamond, and these images, the construction of a 3-dimensional model of the diamond, with measures that can of being manipulated by the gemologist. Basically, the sarin is able to reconstruct the diamond in a virtual world with extreme precision.
This is very useful to obtain measurements on the diamond, the review of the diamond cut, the determination of the angles, and more. In addition, computer software is able to simulate sources light, allowing the gemologist diamond submit the model to different types of light in different intensities and from different (single or multiple), angles, and more. This allows the diamond to be analyzed scientifically in a completely virtual area with amazing precision. The data obtained from this analysis is very useful in determining the quality of the diamond cutting and hence its ability to reflect light.
Scanners are similar to Sarin scanner helium Ogi and scanner. In Emma Parker & Co. we use Sarin.
Devices Reflector
A simple game, but decisive, the tools used for the study and evaluation of a diamond cutting and performance of light are the "reflector devices, the best known of these devices is called the ideal environment.
The premise of these tools is quite simple: show the light that is reflected in the diamond in a way that is visible to the human eye. This allows a person to watch "back light" versus "light leakage" in a diamond with ease.
After reading the Emma Parker & Co. Diamond Tutorial, you must have a solid understanding of the role of the ideal scope and other devices, such as ASET AGSL reflector. If you have not read the Emma Parker & Co. Diamond tutorial, please stop reading here and in its entirety before proceeding, since you will need to understand the next chapters of this tutorial.
DiamCalc Software
DiamCalc Software is a wonderful program that is designed to take the diamond models that are not generated by a "non-contact measuring device" and place in a visible pattern that can be manipulated in a plethora of conditions, angles, lighting.
You can even take the diamonds and simulate models under "reflector devices," as the ideal level, ASET, Firescope, and more. This program is able to "hide" the diamond, if you will, with a visual aspect that is very similar to that of diamond real life.
One of the strongest features of this program is that it allows the user to enter different parameters for the diamond. For example, if we know that a diamond with a ratio Series 1 is good, but we want to see what would happen if the table was a different size, you can change the table in the program and see the effects of this change in the diamond both visually and through a reflector device. This is a very powerful tool for research and demonstration.
GEMEX BrillianceScope
The BrillianceScope was designed to measure the return of light / optical performance of a diamond in direct light. The technology is actually a very simple and logical design.
Check out Figure 3.1
Figure 3.1
This is a basic diagram of the inner workings of BrillianceScope GEMEX. The diamond is based on a circular piece of glass. The cover closes over the diamond, creating an environment completely white around the diamond. (See Figure 3.2
Figure 3.2
Courtesy GEMEX
Light generated by a ring of fiber optic light is then projected upwards through a hole in the middle white-sphere, through the glass at the top of the diamond, as illustrated in Figure 3.1.
Light moves at 5 specific groups of three individual points, stopping briefly at each of the 15 points. For each set of points, a camera, at the bottom of the machine, with the target through the center of the ring light, exhibits triple diamond image, a photograph at each point in the set, "sitting" on top of each other, so to speak.
Once these images are captured and stored, the software breaks down each image into a pixel per pixel to pixel, and examines three distinct themes.
1. The amount of white light that is reflected in the stone. This explains the brightness or brightness to the eye of the beholder.
2. The amount of colored light that is reflected in the stone. This accounts for the fire and rainbow-colored for the audience is naked eye.
3. The "movement" of light within the diamond, also known as scintillation. This will be seen as bright to the eye of the beholder.
These results are then compiled and compared with a controlled database of diamonds that have been tested on the computer, and the results of these tests are the basis for the classification of "comparison" the software system used by GEMEX. The result is a report like the one pictured below.
Figure 3.3
Courtesy GEMEX.
The results of the report GEMEX, shown above in Figure 3.3, are very curved, which means to say that from the bottom of the table, for half of the "high degree" includes to the 85th percentile of all diamonds to the test, while grades half of the label "STOP" at the end of the scale "Very High" includes the 86 – Percentile of the 100 years of all diamonds in the test.
The GEMEX is an interesting and useful to a point to get a sense of how Diamond will perform in direct light conditions, such as direct sunlight, direct pointing, etc.
The GEMEX is limited by the fact that the results only apply to direct illumination, and that its "classification comparison" is a totally subjective classification system that by their nature, will always be subject to any influence that affected the block of results in the control group in which the whole basis of the classification scheme rests.
Another drawback to the GEMEX is that results can be manipulated by a user little tricky. Something as simple as placing a stain on the fingerprint diamond top can cause a much higher rating in the performance of white light that the stone would have if it were completely clean. Meticulous cleaning of diamonds and the glass is absolutely necessary to ensure a proper exploration. GEMEX inspects each examination before a report is published and reject the reports show that the excessive dirt or stains, however, the ease with which the results can be handled is still a tie again in our opinion.
Having a huge amount BrillianceScope experience with GEMEX, both as a selling tool and a tool of analysis, I think technology is the extension of sound, and the results valid. I've also found that consumers have too much in the report, and are often overwhelmed by the "paralysis of analysis" and the fear that a diamond is expected that ratings of "perfect 10" on BrillianceScope, while letting the world-class diamonds pass through a technicality a subjective, computerized, comparison grading "system. That is absurd and should be avoided. It is important to consider all aspects of a performance when buying a diamond stone. To do this, consider a full body analysis, the BrillianceScope is an informative, but non-essential part.
ISEE2
Figure 3.4
Courtesy of Diamonds ISEE2
ISEE2 The machine is another technology that brightness measurements of a diamond, Fire, scintillation and symmetry in a light controlled environment using primarily diffuse light. The inventor of the machine ISEE2 States Diamonds subject to 48 different lighting conditions. The ISEE2 takes 15 frames per second, and analyzes these images, breaking them down to analyze White Light, light colored, light movement (scintillation), and optical symmetry (cutting pattern in the stone, in this case, the machine is in search of hearts and arrows pattern that is most commonly appears in a properly cut facet 57, the traditional round diamond pattern).
Having used ISEE2 widely machine for sale, both in the analysis of the diamonds, I can say ISEE2 results are compatible with other technologies, and are valid for the examination, provided they are not overly weighted by a consumer in making his decision.
As with the BrillianceScope, the scoring system used by the software program is proprietary and unknown to anyone other than the developer. As with the BrillianceScope, this would not normally be a concern, because the results have shown that coincides with the scientifically proven measures of "ideal light performance," except for one critical piece of information, ISEE2 machine was developed by the diamond manufacturer ISEE2 specifically for sales and marketing own brand ISEE2 Diamond, who is 57 facet ideal cut hearts and arrows diamonds.
This fact does not invalidate the ISEE2 as a technology or performance of their null results simply casts a shadow of doubt rebuttable in a technology that has tested positive in laboratory tests with both private and non ISEE2 diamonds Diamonds ISEE2. The problem lies in the subjective rating "by comparison" standard that is used by the software, which is proprietary, and therefore not detectable by consumers. Until now, independent testing, including my own extensive use of ISEE2 seems to show that the classification of those presented by this technology is relatively consistent and accurate compared to existing positions, in terms of cut, large gemological laboratories such as GIA and AGS.
Since the scope Brilliance, the ISEE2 is an interesting but non-essential source of information can be considered when buying a diamond. The biggest danger posed by this technology is the excessive emphasis is often placed by consumers on the importance their results.
GIA Diamond Dock
Figure 3.5
Courtesy of GIA
The Dock Diamond GIA is a light source that is used to evaluate diamonds. (Figure 3.5) The light environment is to simulate the real "summer" as close as possible. Using a combination of fluorescent and LED lighting diffused and is capable of simulating daylight with sufficient accuracy.
This is very useful for observation, photography, and "at a glance" performance analysis of light from a diamond.
The Dock also Diamond functions as a color grading environment.
PRETAIN technology not to "cut DEGREE OF ANALYSIS"
Traditional Triplet Jeweler's Loupe
Figure 3.6
Courtesy Kassoy.com
A Traditional jewelers 'treble' magnifying glass is a simple tool that you will find in almost any good jewelry store. This is a simple, hand-held magnifying glass that allows a viewer to inspect the diamond under magnification quite easily and in almost any location and situation. The increase for this type of standard is 10x loupes, magnifying glasses however are different for 20x and 30x available too.
This particular type of lens is called a triplet, "" because the magnifying glass is actually made up for three different lenses to provide maximum clarity to the viewer.
First, using a magnifying glass can be tricky, however with a little practice, can collect a large amount of information on a diamond just a good, long look at it through a magnifying glass.
Microscope High power with high-definition camera
Figure 3.7
Courtesy Kassoy.com
A good source of a high magnification is essential for the proper analysis of the diamonds. While the observation of a diamond through a 10x triplet loupe is good, having the ability zoom to 50x or 60x magnifying allows a jeweler to learn much more about a diamond and its imperfections, and their court. Also, having the ability to share this information with a client is vital to ensuring that the client feels safe in the diamond they are looking to buy.
In Emma Parker & Co., we use microscopic photo above. This is a 50x microscope lens of glass produced by the Leica Company, a leader in optical glass industry. The microscope also has a high definition camera mounted on it, through the images of the inclusions can be taken, and live video of diamonds can be heard magnified.
Photographs taken by this microscope allows customers to view, in remarkable detail the characteristics of the Diamond magnified. View samples …
Figure 3.8
The red arrows point to the "classification of inclusions in diamond. These are the imperfections that contribute to achieving the degree of diamond clarity, given by the laboratory of classification, as the GIA or AGS.
In Emma Parker & Co., brought these inclusions with red arrows in a photograph taken with a microscope so that our customers can easily locate the incusions in their diamonds.
Colorimeter
Figure 3.9
Courtesy Kassoy.com
In today's technological market advanced advanced and precise tools have emerged for determining the color of a diamond. The tools, called "colorimeter" have advanced to such an extent that they are quite precise and sophisticated. These are incredibly expensive machines, and are not used by everyone in the industry.
As many of our colleagues here at Emma Parker & Co. prefer the old fashion way color adjustment, the way the GIA and AGS are using to grade diamonds, a white tray, a color classification of light, and a set of master stones.
We feel that some things are best left to the human eye and observation of training.
Written by Timothy Andre, Emma Parker & Co. www.emmaparkerdiamonds.com
About the Author
I am a person who is passionate about diamonds…I suppose that is why they are my profession. I am also a non-practicing lawyer, which makes for an interesting combination. As the President of Emma Parker & Co. I get to help people through the wonderful and joyous process of selecting gifts for people that they love. I absolutely love what I do, and would never, by choice, do anything else.
Personally, I love to ski, play baseball, and spend time with my family.
5.58 cts Unmounted Triangular Tanzanite AA Quality
