What to Look For in a Diamond

We believe there are five factors that determine a diamond’s value and beauty. We call these the “5 C’s” and we invite you to learn more about these essential features of our magnificent diamonds.

The Gemological Institute of America (GIA) is considered the most reputable, with the strictest and most comprehensive grading standards. The American Gemological Society (AGS) is another reputable institution. Both organizations provide grading reports and a map of the diamond, and/or a laser inscription on the girdle of the diamond. A grading report (or certification) is not the same as an appraisal. A grading report should be done by an independent gemological laboratory and provide specific information about the diamond.


The most critical factor of a quality diamond, the cut refers to how a diamond is cut, regardless of its shape. Shape is determined by personal taste, and you should always choose the shape you most love. But when considering the cut of a diamond, the ideal cut is the only cut to select.

Diamonds are often cut to maximize the weight, not the brilliance. At The Diamond Source we know that every part of the diamond must be cut to exact mathematical proportions so that the diamond gives off the maximum possible fire and brilliance. The fire is in the cut!

We consider the depth of the diamond, the table diameter, the crown height and angles, the pavilion angles, the thickness of the girdle and the polish and symmetry. Less than one percent of diamonds are cut to ideal proportions. We do not sacrifice cut at The Diamond Source.


The color of a diamond refers to how white or colorless it is. The whiter the diamond, the more rare, beautiful and valuable the stone. The grading scale for diamond color goes from D (whitest) to Z (least white).

Colorless diamonds are very rare and range from D, E and F. About one percent of diamonds qualify for these designations.

Natural Color Diamonds occur in nature in a variety of stunning colors including yellow, blue, pink, orange, green and red. These rare and valuable diamonds are a miracle of nature. Bathed in mystique and an aura of sophistication unrivaled by any other gemstone, natural color diamonds are the epitome of luxury.

Near colorless diamonds, ranging from color ratings of G, H, I and J have good value.


No diamond is the same, and its clarity is determined by how clean or included the stone appears. Inclusions are any visible spot or mark inside the diamond, and diamond clarity is determined using a high power magnification device. The inclusions in a diamond are its fingerprint, and small inclusions will not interfere with the reflection of light or its durability.

Many people believe that the more flawless the diamond the more brilliant it will appear, but this is not true. Brilliance is always determined by the quality of the cut, not the clarity of the diamond. If a diamond is clean to the naked eye the level of clarity will not improve the stone’s visible beauty. The freer of inclusion a diamond is, the more rare and valuable it will be. But cut is still the key!


The weight and size of all precious stones are expressed in carat weight. Size is the most obvious factor in determining the value of a diamond, but cut, color and clarity will dramatically affect the value, no matter the size!

One carat equals one-fifth of a gram. A carat is divided into 100 points so that a diamond of 25 points is equivalent to a weight of ¼ a carat.


At The Diamond Source we add a C to the typical 4 C’s of diamond quality. Having confidence that you are being guided by an experienced and knowledgeable person when selecting a precious gemstone is essential! Our quality, experience and unique designs are unmatched. Let us show you the difference in person.

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