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Diamond Rating System

Diamond Rating SystemDiamond grading is both a subjective and objective trade. It is subject to the degree of experience and judgment of the person performing the analysis, yet it is a discipline which is highly critical in comparison with a long history of gemology culture and established standards. The world of diamond grading is highly specialized, uncommon, and paramount to the preservation of diamonds as the most sought-after gems on the planet.

Diamond grading at www.mitchumjewelers.com is largely dependent upon a gem’s rating according to the traditional “four C’s” standard. The four C’s are color, cut, clarity and carat. Each of these gem features contribute to an overall gradient rating and consequent value. All evaluation of diamonds are performed at the microscopic level using specialized equipment. Gemologists compare each diamond to a standard system and rate them according to that system, as well as, other similar gems that have entered the market.

Coloration is a Rainbow of Value

After scrutiny, all diamonds are placed on a color spectrum scale for classification into a color family. Color is determined by region and age. In general, the lighter the color a diamond is classified, the higher its value will be. Blue and pink diamonds are more highly prized than greenish or amber colored diamonds. Perfectly clear diamonds are the most valued, while brown and ash-colored diamonds are always the cheapest.

Cuts Indicate Size, Rarity and Artistic Appeal

There are hundreds of different cuts that diamonds can be presented with. Extreme artist skill conforms rough gems into geometric shapes that are fitting for jewelry and display. Often, it is the natural shape of a gem that determines how a diamond will be cut. More angles to a diamond’s cut means more luster and brilliance. Whether it is Nature, or the cutter who finely hones the gem, certain cuts illuminate a diamond in a better way than others. The better a cut matches a natural shape, the more total volume will be preserved and utilized. Both Nature and the selected gemologist contributes to cut value.

Clarity is a Prime Indicator of Quality

When placed under microscopic scrutiny, each diamond will reveal a history. Whatever stress and formation processes the diamond has undergone will be evident in its transparency. Regardless of color and size, a diamond will have a certain concentration of fissures, cracks, stress marks and elemental impurities. These are visible with a finely-tuned scope and an experienced eye. The more devoid of impurities a diamond is, the greater its value will be. Clear amber-colored diamonds can easily be worth more than rough and blemished crystal-clear examples.

Carats are the Most Important Diamond Value Factor

Diamond values are only as great as the price collectors and merchants are willing to pay for them. Beyond all other elements, size and weight influences the “romance” of a gem. Usually, carat weight is recorded within a ten-thousandth of a carat. When it comes to market value, it is the whole carat increments that matter most. Once a diamond is weighted over five carats, the weight alone will propel it into a valuation category separate from the majority of gems on the market. With great carat weight, the other “C’s” are factored-in to determine rarity and marketability. It is the job of gemologists like those at www.mitchumjewelers.com to measure the value of extremely large diamonds against others of similar stature.


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