The 4 C's

 

At Cook's Jewelry we understand the its importance of your diamond buying decision and our staff is here to your experience a memorable and enjoyable one. The most important criteria that a jeweler uses while grading a diamond are Cut, Clarity, Color and Carat weight. It's commonly known as 4 C's of a diamond. All this four properties will determine how much a diamond is worth.

Carat Weight

Carat is the unit of weight for all gemstones. One carat is subdivided into 100 "points". Therefore a diamond measuring 75 points is 3/4 carat in weight, or 0.75ct. There are five carats in a gram. The word "carat" comes from the seed of the carob tree pod which is found in tropical climates. These seeds were used until this century to weigh precious gems.

Clarity

A diamond's clarity is determined by the number, nature, position, size and color of internal characteristics called "inclusions" and surface features called "blemishes". These irregularities occurred in the liquid magna (volcanic rock) within which the diamond was created. Diamonds are mostly pure carbon, however, during crystallization other minerals nearby, or even other bits of carbon forming more quickly may have become trapped within the cooling mass. These show themselves as the various characteristics which make up the clarity of a diamond (included crystals, feathers, clouds etc). Clarity is measured on a scale ranging from pure (flawless) to heavily included (I-3). The clarity of a diamond is graded by using 10X magnification under good lighting by an experienced grader. The final clarity grade is usually determined by how easy the inclusions and blemishes are for the grader to see.

Color

Ideally, a diamond should have no color at all, like a drop of spring water. Increasing degrees of body color are measured on a scale ranging from no color at all (D) to deeply colored (Z). Beyond "Z" is the range where the diamond's color is vivid and rich, called "fancy colors". Diamonds of known color are used as comparison stones for color grading. Grading is done by comparing the diamond to be graded against these "master stones" under either artificial or natural north daylight ( in the Northern Hemisphere). A machine called the "Colorimeter" can be used for color grading but there is no substitute for the trained human eye.

Cut

Cut, sometimes the forgotten "C", ensures that a given stone has maximum brilliance and sparkle which would not be the case were the stone cut for weight alone. Simply put, when looking at a diamond, if it doesn't catch your eye or if it doesn't flash in the light, it's probably not well cut. Good cutting is what brings fire to the ice. In its natural state, a diamond’s beauty is generally concealed. While nature determines a diamond’s color, clarity, and carat weight, the hand of a master craftsman is needed to release its fire and beauty. What draws out its brilliance is the cut of the diamond, which under ideal circumstances maximizes the optical properties within the diamond, particularly its ability to refract light and disperse color.

 

 

 

4cs

Visit us at: Westover Square

  • 933 Maple Street * Carrollton,  GA 30117
    Phone: (770) 574-2001
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    Phone: (770) 834-7307
     

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