Understanding Diamond Cut – 4cs Of Diamonds

what is diamond cut?

Do we often consider diamond cuts as different diamond shapes? But the true meaning of the diamond cut is not diamond shape. Instead, it is the relation of diamond facets with the light. 

Factors Affecting Diamond Cut

Diamond cut is the most crucial factor that plays a vital role in diamond value and price. Proportions, finishing details, and facets are various factors that are involved in ability to reflect the light from the diamond. As these characters turn to get better, the quality of diamond also rises which in return determines the price of the diamond. Higher the cut quality, the higher the value of the diamond. Also, the carat and color have an equally important role in determining the beauty of a diamond. The major cut factors that affect the value of diamonds are 

  • Proportions: The proportions of facets in diamonds i.e. table, depth, and width proportions.
  • Symmetrical faces: The steps, the windows, and the mirror of the diamonds.
  • Brilliance: External as well as internal white light reflected from a diamond. 
  • Fire: The white light scattering in all colors of the rainbow within a diamond.
  • Scintillation: The reflection within a diamond causes a dark-light pattern. It is caused due to light reflection within the diamond and leads to the sparkle that is composed in a diamond. 

    READ ARTICLE- OLD & ANTIQUE CUT DIAMONDS
what is diamond cut?

Why Diamond Proportions Important?

The key contributors to the diamond’s face-up appearance are the angles of the crown and pavilion. The diamond’s proportions speak about the brilliance, fire, and scintillation reflected from a diamond. Also, the anatomy of a diamond which consists of various aspects helps to gain maximum brilliance. The proportions explain the excellence and quality of a diamond. 

The diamond cut directly connects to the reflection of light. With different proportions the diamonds cast reflection differently. Therefore, for diamond shoppers it is important to view the measurement and the cut precisely.

Diamond Table

The table facet is the largest facet of all and also the top most facet. It is very important to facet the diamond table to its ideal% based on the diamond shape. If the table facet is larger than the ideal%, there are more chances where light escapes from the facet. Moreover, the vibrant color reflections won’t be visible due to light breakout. 

If the table% is lower than the ideal% the light gets captured inside the diamond. Also, won’t transmit any reflection or brilliance. 

Diamond Width

The diamond width is measured from one end to another end of the girdle. The diamond width is equally important when it comes to determining the length and width ratio of a diamond. Also, ideal proportions of length and width results in an appropriate diamond cut. Dividing the length by the width results in the length and width ratio of a diamond.

Diamond Depth

The distance between the culet to the table facet is the diamond depth%. Along with the table, depth plays an important role in the diamond cut. If the diamonds are faceted with deeper than ideal depth%, it results in the leakage of light from the facets. Whereas, lower depth% will result in a darker appearance and also will not reflect the light within powerfully. 

Diamond Cut Grade Chart

diamond cut grade

The GIA diamond cut chart ranges from excellent to poor with 5 grades. The 5 grades are Poor, Fair, Good, Very Good, and Excellent. These grades are also known to be the ideal grades. Below the GIA diamond chart is classified briefly.

  • Poor:  The diamonds with poor cut releases no fire, sparkle, or brilliance. In this particular grade, the light escapes from the bottom as well as the sides of the diamond.   
  • Fair: In this particular grade, the light reflected offers little sparkle, fire, and brilliance. But due to fair faceting, this specific grade is a satisfactory choice only for smaller carats.  
  • Good: Good cut diamonds reflect a quality of light where viewers can easily notice the sparkle and brilliance of the diamond.
  • Very good: This grade of diamonds contributes to exceptional fire and brilliance along with sparkle. The entering light in the diamond reflects a large amount of light through the table.  
  • Excellent: The excellent cut grade yields the highest amount of fire and brilliance. The light entered reflects back with splendid sparkle due to excellent faceting. 

Conclusion : Best Diamond Cut

Optimal facet angles and ideal proportions result in the best cut for diamonds. The light that enters the diamond is not escaped but reflects internally and results in sparkle and fire from the table facet. The appropriate faceted angles allow the highest brilliance to show off from a diamond. 

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