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Education
Diamond education
Color
Diamond color actually means lack of color. The diamond color evaluation of most gem-quality diamonds is based on the absence of color. A chemically pure and structurally perfect diamond has no hue, like a drop of pure water, and consequently, a higher value. GIA's D-to-Z diamond color-grading system measures the degree of colorlessness by comparing a stone under controlled lighting and precise viewing conditions to masterstones of established color value.
GIA's diamond D-to-Z color-grading scale is the industry's most widely accepted grading system. The scale begins with the letter D, representing colorless, and continues, with increasing presence of color, to the letter Z. Many of these color distinctions are so subtle that they are invisible to the untrained eye; however, these distinctions make a very big difference in diamond quality and price.

Clarity
Diamond clarity refers to the absence of inclusions and blemishes. Natural diamonds are the result of carbon exposed to tremendous heat and pressure deep in the earth. This process can result in a variety of internal characteristics called 'inclusions' and external characteristics called 'blemishes.'

Cut
A diamond's cut unleashes its light. Diamonds are renowned for their ability to transmit light and sparkle so intensely. We often think of a diamond's cut as shape (round, emerald, pear), but a diamond's cut grade is really about how well a diamond's facets interact with light. Precise artistry and workmanship are required to fashion a stone so its proportions, symmetry, and polish deliver the magnificent return of light only possible in a diamond.

Carat weight
Diamond carat weight is the measurement of how much a diamond weighs. A metric "carat" is defined as 200 milligrams. Each carat can be subdivided into 100 'points.' This allows very precise measurements to the hundredth decimal place. A jeweler may describe the weight of a diamond below one carat by its 'points' alone. For instance, the jeweler may refer to a diamond that weighs 0.25 carats as a 'twenty-five pointer.' Diamond weights greater than one carat are expressed in carats and decimals. A 1.08 carat stone would be described as 'one point oh eight carats.


Round cut
The most popular diamond shape, the Round Cut is generally superior to fancy shapes at the proper reflection of light, maximizing potential brightness.

Princess cut
First created in 1980, this is the most popular fancy diamond shape, especially for engagement rings. Like the Round Cut, the Princess Cut is a good choice for its flexibility in working in almost any style of setting.

Oval cut
Possessing a similar fire and brilliance to the Round Cut, Oval Cut diamonds have the added advantage of an elongated shape, which can create the illusion of greater size.

Marquise cut
Because the Marquise Cut is long and narrow, it can create the illusion of greater size. Carat for carat, the Marquise diamond has one of the largest surface areas of any diamond shape.

Pear shaped
A combination of a Round and a Marquise, with a tapered point on one end. A Pear shaped diamond should ideally possess excellent or very good symmetry, forming uniform, symmetrical curves.

Cushion cut
Combines a Square Cut with rounded corners, much like a pillow. This classic cut has been around for almost 200 years. Refinements in cut have led to a recent resurgence in popularity.

Emerald cut
Instead of the sparkle of a brilliant- cut, Emerald Cut diamonds produce a hall-of-mirrors effect, with the interplay of light and dark planes. Often, inclusions or body color are easier to see in an emerald cut.

Asscher cut
The Asscher Cut diamond is similar to the Emerald Cut, but in a square shape with larger step facets, a higher crown, and a smaller table. This combination often produces more brilliance.

Radiant cut
The first rectangular cut to have a brilliant-cut facet applied to both the crown and pavilion. The modified square looks beautiful set with rounded or square cornered diamonds.

Heart shaped
Heart Shaped cuts are an unmistakable symbol of love. Heart shaped diamonds smaller than .50 carats may not be a good choice, since the shape is more difficult to perceive in smaller diamonds.