Diamond Cut | The 4 C’s Buyer’s Guide

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The Diamond Cut does not refer to the shape of a diamond (round, princess, emerald , pear, oval etc.). But rather cut refers to the symmetry, proportion and polish of a diamond. Because the cut of a diamond greatly affects a diamond’s brilliance, you must pay attention to it. Astor Cuts are the top diamonds cuts that result in wonderful brilliance everyone is looking for in a diamond.

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In contrast, poor cuts result in poor luminosity. Not only do well-cut diamonds appear more brilliant, they also appear larger than diamonds of the same carat weight. An “ideal” diamond has both increased brilliance and diameter relative to more deeply-cut diamonds.

Click The Image Below To Browse an Inventory of Diamonds With a Cut Grading Filter @ Blue Nile:best cut diamond

Cut Grades


There are 4 main categories of diamond cut grades. There is, Good Cuts, Very Good Cuts, Ideal Cuts and True Heart cuts.

  • Good Cut- This is a quality economy cut that does not sacrifice beauty or sparkle. 
  • Very Good Cut- This is a great cut that almost reflects as much light as an ideal cut but at the best price possible.
  • Ideal Cut- An ideal cut diamond is only available in a round shape cut or princess shape cut diamond. “Ideal Cut” diamonds have ideal proportions and angles. In addition, it has excellent polish and symmetry ratings. An “Ideal Cut” diamond reflects almost all the light, and is among the rarest cuts. The “Ideal Cut” diamond is a benchmark for grading all other diamonds.
  • Astor Cut- The best type of ideal cut diamond is a “Astor Cut Diamond” This is because Genuine Hearts and Arrows have perfect optical symmetry. As a result you, get the best light dispersion possible. James Allen has 20X HD photographs of all True Heart diamonds.

Brilliance, Dispersion & Scintillation

Well-cut diamonds exhibit 3 main properties:

  1. Brilliance
  2. Dispersion
  3. Scintillation

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The light that strikes a diamond’s surface will either reflect the diamond or enter the diamond.The light that reflects off the diamond is the diamond’s Brilliance.

Light travels in and through a diamond and separates into flashes of color. AKA Dispersion. Dispersion is the separation of white light into the full-color spectrum. Diamond Professionals also call this: “Fire”. Similarly, rainbows are visible to the human eye based on the same light physics.1 carat diamond ring - diamond cut As pure white light shines through clear water vapors, it consequently creates a colorful band that exhibits all visible colors. Similarly, as light passes through a well-cut diamond, you get a fiery color effect of light. 

Scintillation is flashes of color that are visible as an observer moves a diamond back and forth. Good scintillation results in a great sparkle effect that glimmers as the hand with the ring on moves. 

The different diamond cut grades make an incredibly huge difference on the appearance diamonds because of the phenomenon of light physics. as a result you get a wonderful sparkle that everyone loves.

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1 Carat Diamond Ring
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The Cut attribute does not refer to the shape of a diamond. The diamond cut grading technique measures the symmetry, proportioning and polish of a diamond. A good diamond cut has the ability to refract light to give the rainbow, multi color, FIRE EFFECT to a diamond.
John Diamond
1 Carat Diamond Ring Shopping Tips
1 Carat Diamond Ring Shopping Tips

John Diamond

Hi. My name is John Diamond. This world is changing fast and one of those big changes is how people are buying engagement rings online vs traditional jewelry stores. That is why I am here to educate you how to buy high quality custom engagement rings and give specific 1 carat diamond ring shopping to save 30%-70% on the highest quality diamond rings.