The Four C's - Cut

When choosing a diamond you will more than likely be told about the 4 C’s. These relate to Cut, Colour, Clarity and Carat weight, and are classifications that are used to categorise diamonds, and to help define their true beauty.

The Cut

At Beaverbrooks, we hold the cut of a diamond in the highest regard, as it is only those that are most beautifully cut that demonstrate a diamond’s true fire, brilliance and scintillation.

Although the cut also refers to the stone’s shape, the quality of the diamond’s cut relates only to how well the facets interact with light. Behind every beautiful diamond is a highly skilled diamond cutter. They will take the rough diamond and decide how best to split it to achieve the most beautiful stone. They will then cut and polish the diamond to the desired shape with artistry and mathematical precision, ensuring that the proportions of the facets are correct, and that the diamond is symmetrical and balanced.

Types of Cut

  • Brilliant Cut

    Brilliant +

    Cut with 57 facets, the round brilliant is probably the most recognisable of cuts. It offers the most fire, brilliance and scintillation, and sets the standard for all other diamond shapes.

  • Emerald Cut Diamonds

    Emerald +

    Usually rectangular in shape, emerald cut stones have rows of long facets on the crown. An emerald cut stone will highlight a diamond’s clarity.

  • Marquise Cut Diamonds

    Marquise +

    A version of the brilliant cut, the marquise is boat shaped and can help make fingers look long and slender. The cut can maximise carat weight, creating a diamond that is visually much larger.

  • Oval Cut Diamonds

    Oval +

    A vintage style that is a modification of the round brilliant cut, it has lots of brilliance and fire, and has become a fashionable shape to set as a central stone in a cluster or halo ring.

  • Pear Cut Diamonds

    Pear +

    A combination of round and marquise cuts, it is an elegant and flattering style.

  • Princess Cut Diamonds

    Princess +

    With more fire and sparkle than an ordinary square stone, the princess cut diamond is a modern choice and can also work well when set in a continuous row. Princess cut works well for high carat diamonds.

A diamond’s natural beauty is only demonstrated by how it interacts with light. When light strikes the top of the diamond, also known as the crown, some of the light will be reflected back to you in a phenomenon known as external reflection. The rest of the light will penetrate the diamond and will be bent, or refracted, towards the centre of the stone. Internal reflection then occurs, when the light is bounced around inside the diamond, before emerging again through the crown, where it will be dispersed into the colours of the rainbow.

A well cut diamond will ensure that the majority of light that enters the stone will be reflected back through the crown, making it sparkle. Stones that have either been cut too deep (to make them heavier) or too shallow (to make them bigger), will allow light to escape through the sides or to be lost through the bottom, making the stone look dull or even black in the centre.

The Cut

“All you need to do is look at your diamond. Does it appear white and bright? Move it about in the light and see if flashes of rainbow colours dance on the surface. You’ll recognise a well cut diamond instantly; it’s the one that will”

The Cut Light Reflection

When looking at diamonds, you will hear the terms Fire, Brilliance and Scintillation. These all relate to the quality of the diamond’s cut, and are easy for you to see for yourself as you look at your diamond. Brightness relates to the internal and external white light reflected from the diamond. Fire is the scattering of white light into all the colour of the rainbow, and Scintillation is the amount of sparkle your diamond produces. All you need to do is look at your diamond. Does it appear white and bright? Move it about in the light and see if flashes of rainbow colours dance on the surface. You’ll recognise a well cut diamond instantly; it’s the one that will take your breath away.

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