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Diamond Knowledge

Diamond Cut

The cut of a diamond refers not to its shape, but its balance of proportion, symmetry and polish that creates sparkle and brilliance. Cut refers to how the facets of a diamond interact with light, and is the most important determinant of the stone’s overall beauty. 

Love & Co.’s diamonds are cut to exacting standards, bringing maximum brilliance and sparkle.

How is Diamond Cut Important?

When a diamond has been correctly cut, the diamond’s ability to reflect and refract light is greatly enhanced. By understanding the way that light moves through diamond crystals, modern diamond cutters have established a specific set of proportions and angles that are known to harness the diamond’s internal brilliance and show it in its best light.

At Love & Co., our master craftsmen dedicate themselves to crafting a diamond to exacting standards, in order to achieve excellent proportions.

  • Fair
  • Good
  • Very Good
  • Excellent

Fair quality cut which generates a decent amount of brilliance and light. While not as brilliant as a good cut, it is still a quality diamond.


Premium cut to optimise the size without sacrificing quality or beauty. Reflects most light that enters.

Very Good

Superior quality cut that reflects nearly as much light as the excellent cut.


Cut to the most exacting standards. These diamonds have the most desirable dimensions and are proportioned to return the maximum possible light. Excellent cut round diamonds display a perfect 8 hearts and 8 arrows pattern.

Factors Surrounding the Cut of a Diamond

Cut is responsible for the quality of a diamond’s brightness and sparkle. The quality of cut is determined by three factors:

Polish: The placement of the diamond’s facets and the exterior finish of the diamond.

Symmetry: The precise intersection and alignment of the various diamond facets.

Proportions: How the size, shape, and angle of each diamond facet interacts with one another to produce the best combination for the reflection and refraction of light.

These three factors determine how light is reflected back from the diamond, which can be measured in terms of the brilliance, dispersion, and scintillation of the light reflection. The characteristics of a well cut diamond will be superior in brilliance, dispersion, and scintillation.

Evaluating a Diamond's Sparkle

The most straightforward way to evaluate a diamond’s sparkle is to observe it under different light conditions. Alternatively, specialised equipment can also be used to specifically measure how a diamond reflects light, and how much is reflected out. 

Some reports, in addition to measuring a diamond’s 4Cs, specifically measure a diamond’s light performance. An example would be the Sarine Light Performance Report – which provides accurate grading on a diamond’s light performance.

Engagement Rings

Explore Love & Co.’s curated range of diamond rings – brighter and more beautiful than others.

Engagement Rings

Explore Love & Co.’s curated range of diamond rings – brighter and more beautiful than others.

LVC Precieux Collection

Larger, fancier, and comes in a collection of colours. Discover the new generation of diamond engagement rings made only possible with science.

Made For You, By You

Our bespoke service allows you to build your ring from scratch. A visual and hands-on experience like no other.

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