Diamond Cut | How To Shop For Loose Diamonds

1 carat diamond ring

Diamond Cut

The Diamond Cut does not refer to the shape of a diamond (round, princess, emerald , pear, oval etc.). Cut refers to symmetry, proportion and polish of a diamond. Because the cut of a diamond greatly affects a diamond’s brilliance.Ideal” Cuts and “True Heart” Cuts result in wonderful brilliance. 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 View James Allen’s Inventory of Well Cut Diamonds:1 carat diamond ring

Cut Types

At James Allen, there are 4 categories of diamond cuts. 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. 

    1 carat diamond ring

    Good Cut

  • Very Good Cut- This is a great cut that almost reflects as much light as an ideal cut but at the best price possible.

    1 carat diamond ring

    Very Good Cut

  • 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.

    1 carat diamond ring

    Ideal Cut

  • True Heart Cut- The best type of ideal cut diamond is a “True Heart Diamond”. 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.

    1 carat diamond ring

    True Hearts Cut

Brilliance, Dispersion & Scintillation

Well-cut diamonds exhibit 3 main properties:

  1. Brilliance
  2. Dispersion
  3. Scintillation

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.

The light that travels in and through a diamond and separates into flashes of color is referred to as 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.

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