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Consumer Diamond Education - Diamond Cut








Diamond cut determines its brilliance. There is no single measurement of a diamond that defines its cut, but rather a collection of measurements and observations that determine the relationship between a diamond’s light performance, dimensions, and finish.  Most gemologist consider cut the most important diamond characteristic, because if a diamond has perfect Color and Clarity, a diamond with poor cut will have dulled brilliance.

The Width and Depth can have an effect on how light travels within the diamond, and how it exits the diamond in the form of brilliance.

Cut determines Diamond Brilliance

Determining a diamond’s cut grade, however, goes beyond simple measurements of width and depth.  Using an optical measuring device, a three dimensional model is created to determine the diamond’s proportions and angles.  The interrelations between these various dimensions will greatly affect how light reacts once it enters and how it behaves once it exits the diamond; by using sophisticated computer modeling, it is possible to trace light behavior and measure its levels of brightness, fire, and scintillation; face up appearance.

Diamond Map Characteristics

  • Diameter: The width of the diamond as measured through the girdle
  • Table: The largest facet of a gemstone (diamond)
  • Crown: The top portion of a diamond extending from the girdle to the table
  • Girdle: The intersection of the crown and pavilion which defines the perimeter of the diamond
  • Pavilion: The bottom portion of a diamond, extending from the girdle to the culet
  • Culet: The facet at the tip of a diamond (gemstone).  The preferred culet is not visible with the unaided eye, graded as “None” or “Small”
  • Depth: The height of a diamond (gemstone) measured from the culet to the table

Polish and Symmetry Affect Sparkle

Polish and symmetry of diamonds are two important aspects of the cutting process of diamonds. The diamond’s polish grade describes the smoothness of the diamond’s facets, and the diamond’s symmetry grade refers to alignment of the diamond’s facets.  With poor polish, the diamond’s surface facet can be dulled, and may create blurred or dulled sparkle from a diamond. With poor symmetry in a diamond, light can be misdirected as it enters and exits a diamond.  The polish and symmetry grades are clearly listed in each The Jewelry Hut diamond detail page list or within the GIA or other independent diamond grading report.  For the most beautiful diamond, look for a symmetry grade of  “Ideal” (Round Shape Only), “Excellent”, “Very Good”, or “Good” on most diamond grading repost.  One should avoid diamonds with symmetry grades of “Fair” or “Poor” as the alignment of their diamond facets may misdirect light so severely that it affects the brilliance of the diamond.

Diamond measurements are calculated and applies to a grading cut scale that makes it easy to understand how well each diamond reflect light:

  • Ideal Cut:
    The highest grades of polish and symmetry that allows it diamond to reflect more or nearly all light that enters the diamond. The Jewelry Hut Most brilliant or exquisite and rare cut diamonds
  • Very Good Cut:
    Refers to diamonds that reflect nearly as much light as the ideal cut, but for a lower price.
  • Good Cut:
    Refers to diamonds that reflect most light that enters the diamond.  These good Cut diamonds are less expensive than the very good cut diamonds.
  • Fair Cut:
    Refers to diamonds that does not reflects all light that enter the diamond.  These fair cut diamonds are still a quality diamonds, but they will not be as brilliant as a good cut diamond.
  • Poor Cut:
    Are diamonds that do not meet the performance standards of a fair cut diamonds.  These diamonds are generally deep and narrow or shallow and wide , and they tend to loose most of the light out of their sides and bottom. You will not find these diamonds at The Jewelry Hut Diamonds Gallery Store.

At The Jewelry Hut, you will find the best selection of GIA certified ‘Ideal Cut’, ‘Very Good Cut’, and ‘Good Cut’ diamonds grade at the most affordable low prices.

Which Diamond Cut is the Best for me?

At The Jewelry Hut, look for a diamond with the best cut, that will look exceptional even when the diamond is viewed under a microscope.  These diamonds reflect the most brilliance because they are cut to the most exacting proportions. These diamonds have the highest polish and symmetry grade for all round or fancy shape diamonds.

For the best value in a brilliant diamond, choose a diamond with a cut grade of ‘Good Cut’ or ‘Very Good Cut’, and of ‘Good’ or ‘Very Good’ grades for polish and symmetry.  You may want to consider choosing a less expensive diamond with color and clarity of G or H Color and SI1 or SI2 clarity with diamond that has an ‘Ideal Cut’ or ‘Very Good Cut’ grades with ‘Very Good’ or ‘Good’ polish or symmetry grades.


Diamond Tips and Hints

  1. How important is diamond cut?
    While there are many factors to bear in mind when choosing a diamond, diamond cut is probably the most important to consider, as it has a direct correlation to diamond’s appearance.  A diamond with Ideal or Excellent cut grade proportions will return the maximum amount of light to the viewer’s eye, the diamond will appear more brilliant and beautiful as a result.  The Jewelry Hut diamond expert jewelers recommend you to select the highest diamond cut grade possible to suit your taste and budget in order to maximize the brilliance of your diamond. Diamond cut is graded by GIA, AGS, or other independent diamond grading lab as Ideal, Excellent, Very Good, Good, Fair, and Poor.  You will not find a diamond that is classified as a Fair or Poor cut diamond at The Jewelry Hut Diamond Galleria Boutique Store.
  2. How will diamond cut affect a diamond appearance?
    Diamond cut affects a diamond’s light reflection properties; also known as scintillation, fire or brilliance.  Brilliance refers to the white light that is reflected up through the surface of a diamond, scintillation is the sparkling pattern on a diamond’s surface, and fire describes the flashes of rainbow color light which is reflected off a well cut diamond.  A well cut diamond will display brilliance throughout the diamond.  By contrast , a poorly cut diamond will appear dull or glassy and may have dark areas where light is not optimally returned to the viewer’s eye.
  3. What the difference between other jewelers Ideal Cut diamonds and The Jewelry Hut Ideal Cut Diamonds?
    Both diamond grades of Ideal or Excellent Cut diamonds are the highest quality diamond cut.  Ideal cut diamonds are graded as such because they fall within the ideal cut grade parameters specified by the diamond grading labs.  While both The Jewelry Hut Ideal cut diamonds and other jewelry stores Ideal cut diamonds are of the highest quality, there slight variations within the Ideal cut grade. The Jewelry Hut Ideal cut diamonds are of the highest ideal cut diamonds in the strictest sense of the word and conform to the most rigid cut grade parameters.  At The Jewelry Hut, the standards for Ideal cut diamonds ensure our valued customers that these diamonds are the highest quality ideal cut diamond you can find at the most affordable low prices.
  4. What is the difference between a diamond cut and diamond shape?
    Diamond cut refers to a diamond’s finish, proportions, and measurements and is graded as Ideal, Excellent, Very Good, Good, Fair, and Poor cut.  Diamond shape refers to the shape into which the diamond is cut.  When diamond cutters receive rough diamonds, or uncut diamonds, they typically assess the natural shape of the diamond and determine which shape to cut the diamond into. The most common diamond shape is round brilliant diamondPrincess, Emerald, Radiant, Asccher, Oval, Cushion, Marquise, and Pear are the other popular diamond shapes.  Learn more about Diamond Shapes.
  5. How does cut affect diamond value?
    Better grades cut diamonds are likely to display more fire and brilliance, and since their appearance is more desirable, they are priced accordingly. The cut grade of a diamond also depends on the skill of the diamond cutter.  Cutting a diamond with the degree of precision required to produce and ideal cut stone is rare and valuable skill, therefore, diamonds of this grade are more expensive.  The diamond jewelers at The Jewelry Hut recommends our valued customers to select a diamond with the highest cut grade that your taste and budget will allow you to buy in order to maximize the brilliance of the diamond you desire.
  6. Why is there no ideal cut grade for the diamond shape one may have selected?
    GIA and AGS, the independent diamond grading labs, have only extended Ideal or Excellent cut grade parameters to the round brilliant diamonds.  There is no industry standard for ideal or excellent cut diamonds that are not round shape brilliant diamonds.  The round brilliant diamond shape is the most popular and most searched diamond shape by consumers. It is always perfectly symmetrical, making it possible to consistently grade these diamonds as Ideal or Excellent according to their measurements and proportions.

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