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The Fake Grade of diamonds


Diamonds come in virtually all colors of the rainbow, from the “beautiful violet” of the Hope diamond to shades of blue, brown, gray, orange, tec. But colored diamonds are very rare and precious. Chances are, all the diamonds you’ll see in your diamond wholesale shop or online stores will be white or yellow, and the whiter the better. The yellow color in diamonds comes from nitrogen, and as a rule, the more yellow the stone, the less value it has. There’s a good reason for this. The yellower the stone, the less sharp and sparkly it appears. A whiter stone lets more light pass through it, making it sparkle and shine. The exception to the rule is the canary diamond, which is a beautiful; bright yellow and very expensive.

Some people are more sensitive to the color of diamonds. What may appear slightly yellow to you may look clear to another person. So it will take a higher color grade to satisfy you.

The best way to judge the color of a diamond is to compare it to a master set or a colorimeter. A master set of diamonds has been graded in a laboratory. A colorimeter is a device that grades the diamond automatically without the need of human eye participation. Either asks the jeweler for a set and compares the diamonds you’re thinking of buying with the diamonds in the master set, or have the jeweler place the diamond in the colorimeter to get an accurate grade.

Even tough there are several grades in each category, there are slight differences between the letter grades. D is the clearest and most valuable, X is a dingy yellow and least expensive, Z grade grade – colored diamonds – are the rarest and most expensive. A diamond so saturated with nitrogen that it becomes a deep, rich yellow is as rare as a colorless diamond.

Color typing
Let’s start this piece by asking what might, on the surface, seen like a very simple question, shouldn’t two diamonds of the exact same weight, same clarity, same color, exact same proportions, same purchase date, same certificate date, both bonded with the exact same marking, cost the same? Well, if you ask the labs or check with any of the major price guides like Rapaport, the answer would be a resounding yes.
But pick up your phone and visit your local jeweler, or surf the web and I promise you that you’ll find twins that are not the same price but, in some cases, they are not even close. You’ll even find two identical diamonds at the same location with totally different prices. Why? How can this be? It’s true nor all SI1s are created equal, some have centralized inclusions, while others have perimeter inclusions which are certainly more desirable and valuable.

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