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The 4 C's of Diamonds

What difference can the cut of a diamond make? It's a question that deserves a detailed answer. Each cut we make in the creation of a diamond unlocks the beauty in the form of sparkle. The final effect is magic. Over generations, we at Sheiban have focused on our craft, using artistry and science to improve the brilliance, and create more of the allure that attracts us.

  • Cut

    A good cut gives a diamond its brilliance. Quite simply, the diamond that is cut the best will sparkle the most.

  • Color

    The color grade refers to the diamonds lack of color, colorless diamonds are considered to be the most valuable.

  • Clarity

    Refers to the size, nature, and location of a stones inclusions or lack thereof.

  • Carats

    This is a measure of a diamond's weight and a reflection of its size.

What is a Diamond's Cut?

A well cut diamond can make light perform in breathtaking ways, resulting in a magnificent display of three important diamond attributes: brillance, fire, and scintilation.

  • Brilliance

    The brightness created by the combination of all the white light reflections from the surface and inside of a polished diamond.

  • Fire

    The flashes of color you see in a polished diamond.

     

  • Scintillation

    The flashes of light you see when the diamond, the light, or the observer moves.

Other factors indicate the care the polisher used when finishing the stone. These include the symmetry of the facets and their relationship to one and other, as well as the finesness of the polish. These elements all contribute to the overall apperance of your diamond.

What is a Diamonds Color

A diamond's color grade is based on how noticeable the color is, GIA refers to this as the D-Z range, also known as the depth of color. The difference in color grade can have a significant impact on price and appearance.

D-E-F : These grades are considered colorless, D and E diamonds have virtually no color, and an F has a nearly undectable amount of color that shows only in the facedown position. The differences between these grades are actually very slight, in diamonds smaller then .25 ct. they are almost indistinguishable. Diamonds in this color range are extremely rare and valuable.
G-H-I-J : These grades are near-colorless. Diamonds with these grades look colorless face-up and nearly colorless face-down. They might have slight traces of color that aren't noticeable to to the untrained eye when the stone is mounted. * All Sheiban Diamonds are a Grade I or better.
Grades K and below : These Diamonds present from faint to light yellow cast. Once a diamond goes beyond the Z color range it enters the fancy color range starting with Fancy Light Yellow.

GIA'S strict guidelines for each color range make communication about diamond color dependable and accurate. A GIA graded F-color Diamond is an F-Color Diamond, no matter where you are. **Your diamond should always be accompanied by a GIA grading certificate.

What is a Diamond's Clarity?

Few things in nature are absoulutely perfect, That's as true of diamonds as anything else. Diamonds have internal features, called inclusions, and surface ireegularities called blemishes. Together they're called clarity characteristincs. Clarity is the relative abscence of inclusions and blemishes.

Evaluating diamond clarity involves determining the number, size, relief, nature, and position of these characteristics, as well as how these affect the overall appearance of the stone. While no diamond is perfectly pure, the closer it comes, the higher its value.

The GIA Diamond Clarity Scale has a 11 specific grades, amongst 6 categories.

Flawless (FL) - No inclusions and no blemishes visible under 10x magnification.
Internally Flawless (IF) - No inclusions visible under 10x magnification.
Very, Very Slight Included (VVS1 and VVS2) - Inclusions so slight they are difficult for a skilled grader to see under 10x magnification.
Very Slightly Included (VS1 and VS2) - Inclusions are observed with effort under 10x magnification, but can be characterized as minor.
Slightly Included (SI1 AND SI2) - Inclusions are noticeable under 10x magnification.
Included (I1, I2, and I3) - Inclusions are obvious under 10x magnification which may affect transparency and brilliance.

Many inclusions and blemishes are too tiny to be seen by anyone other than a trained diamond grader. To the naked eye, a VS1 and an SI2 diamond may look exactly the same, but these diamonds are quite different in terms of overall quality. This is why expert and accurate assessment of diamond clarity is extremely important.

Definitions for the Clarity

Number - The number of inclusions is important, but it is not just a matter of counting inclusions. A stone can have many tiny inclusions, and still be high on the clarity scale. One or two of the largest inclusions usually set the grade.
Position - An inclusion's position affect's its visibility. An inclusion might be small and in an inconspicuous place, or in a position where it might reflect in the facets (called a reflector). Reflectors lower the clarity grade more then similar, non reflecting inclusions.
Relief - Relief means visibility. Most inclusions are white or colorless, but some can be black, brown, dark red, or green. The dark inclusions are usually easier to seem so they have a greater impace on the clarity grade than colorless inclusions.
Nature - The nature of a diamond's inclusions also influences its clarity grade. Large breaks, are potentially hazardous to the durability of the stone. These types of inclusions typically have a greater impact on the clarity grade than any other inclusion.
Size - The effect of size is obvious: Large inclusions affect clarity grade more than smaller ones.

What is a Diamond's Carat Weight?

The metric carat is divided into 100 points. A pt. is one hundreth of a carat. An easy way to remember this is to think of carats as dollars and cents.

They are even written the same way: $1.34 means one dollar and 34 cents, and 1.34 carats means one carat and 34 points.

The larger the stone the more limited the availability. Larger stones are quite simply rarer this is impacts the relationship between rarity and value.The more scarce something is the more it is worth. So a larger stone doesn't just cost more it costs more per carat. 

A 1.00 ct diamond weighs the same as four .25 ct diamonds, but even if all the other quality factors are equal, the larger diamond is worth more than the sum of the four smaller stones.

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