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Jewelry Books

Diamond Ring Buying Guide by Renee Newman
Consumer-oriented book filled with useful information, drawings & pictures for 1st time diamond buyer.

Photo Masters of Diamond Grading by Gary Roskin
Photo Masters is a compilation of 244 extraordinary photomicrographs, suitable for students or experienced diamond graders.

Blood Diamonds

Blood Diamonds cost torture & death for Sierra Leone residents. Conflict Diamonds finance civil wars & terrorists, including al Qaeda.

Antique Price Guide

By Judith Miller, author of more than 80 books on antiques, including "How to Make Money Out of Antiques."

The 5C's

Carat - Color - Clarity - Cut - Cost



The cut of a Diamond is the only property which is totally dependent on man. Although often overlooked, cut is actually one of the most important aspects to consider when choosing your diamond. A Diamond cutter analyzes the rough diamond, and has to determine how to extract the most beauty and most profit out of the rough stone.

Cut refers to not only the shape of the diamonds, but its proportions and finish, factors which determine the sparkle of the diamond.

It is possible to take the same stone, and depending on which method the cutter decides to use, to either cut it into the most beautiful stone it can be despite heavy weight loss and perhaps lower monetary value. Or else, he can cut a stone to its maximum weight and monetary value, but lose some "brilliance" and "sparkle"!

You see, even if you have two equal polished diamonds, both the same carat size, both the same color, both the same clarity, they may look completely different. How? There are many different shapes, and facets in a diamond. The weight can be distributed in different parts of the stone.

The goal in terms of extracting the greatest beauty from a Diamond, is to have light enter a Diamond, disperse the light as it bounces inside the Diamond, thereby producing the different colors and sparkly effect, and finally returning as much light to the eye as possible.

According to conventional wisdom, the proportions shown at the top of this page are the best for maximum light return. The 2-dimensional illustration below shows the theoretical path a ray of light will take through an ideal-cut Diamond. wellcut.gif (1520 bytes). As you can see, the rays of light entering the Diamond, reflect back to the eye. But it is possible for a diamond cutter to extract more weight out of the diamond by increasing the diameter of the stone. This will make the stone too shallow, and light may escape from the side of the stone, as shown here...shallow1.gif (1325 bytes) or leak out of the bottom of the stone, like here...shallow2.gif (1239 bytes) Another side-effect of this cut, is that it makes the stone appear larger. Don't be fooled by this. The fact that it appears larger than it is does not make it a better stone. If you compare a shallow stone to a well-cut stone, you will see the difference in how the well-cut stone "lights up".

By the same token, it is common to see the opposite problem. A stone which is cut too deep will "leak out light" in much the same way as the shallow stone. Here are two illustrations . . .
1) deep1.gif (1275 bytes) and 2) deep2.gif (1385 bytes).

This is not to say that a shallow or deep stone is a sign of a poor, or "low-quality" diamond cutter. Sometimes the shape of the rough diamond makes it impractical to cut a stone closer to "ideal" proportions without losing significant weight. But it is important to note the "light leakage" which will result from this cut.

Recently, GIA has published the first report of their 8-year study of the cut of Diamonds, using a 3D model rather than the 2D model in use since the early part of this century. So far, nothing practical has come out of this research, other than making the point that there are definciencies in the 2-Dimensional model, and that there are a great many different angles and proportions which can be just as beautiful as what is accepted as Ideal-Cut today. This point is well known to anyone who has graded many Diamonds.

How much does "cut" affect cost?

The effect of all the different properties of Diamond on Cost is discussed in more detail in the Cost section. For cut, it can vary depending on the quality of the Diamond.

Learn More

Cuts for Collectors
Gorgeous Oval Cut Diamonds
Rose Cut Diamond
Asscher cut diamond
Anyone in knowledge of "INVISIBLE" Diamond Cut Technology
Portuguese Cut Diamond?
Any information on Elara diamond cut?
Computer Technology and Diamond Cut
Cyclone cut diamond??? (Tycoon Cut)
Phoenix Cut Diamond
What is a full cut Diamond?
Duchess cut diamond
Pics of fire rose cut diamond
The Zoe cut Diamond... only 12 cut a year??


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