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    Shapes Explained

    There are many different shapes that diamonds can be cut in, each with its own unique traits. Since shape is mostly a matter of taste, it is important to understand the attributes of each so you make the right choice.

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    At Diamond Exchange, we have an exceptional range of round brilliant cut diamonds, along with thousands of the finest non-round diamonds, also known as fancy cut diamonds. While diamonds can be cut in many different shapes, you can trust that Diamond Exchange applies the same high-quality standards to all our diamond shapes.

     

    Round Brilliant Cut

    The round brilliant cut diamond is by far the most popular shape available today. It is also the most thoroughly studied, with almost 100 years of research and precise calculations going into optimising the fire and brilliance of a round brilliant cut diamond.

     

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    A round brilliant cut diamond generally has 58 facets – 33 in the crown (top) and 25 in the pavilion (bottom) – and the proportions and relationship between the facets are what dictate the diamond’s cut grade. Please note that the polish and symmetry of a round brilliant cut diamond are also very important.

     

    For the most brilliance, Diamond Exchange recommends that you select a round brilliant cut diamond in one of the three top cut grades – Ideal, Excellent and Very Good.

     

    Princess Cut

    The princess cut diamond is also a very popular cut, ranking second only to the round brilliant cut. Because it has pointed corners and is traditionally square, the princess cut’s unique shape makes it a favourite for engagement rings.

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    Please note that princess cut diamonds can also vary greatly in how square or rectangular they are. The length-to-width ratio of the diamond will determine how it will look when viewed from above. To calculate the length-to-width ratio, divide the length dimension by the width dimension (the width is expressed as 1).  For a square shape, the length-to-width ratio should range between 1 and 1.05. For a rectangular shape, the length-to-width ratio should be greater than 1.10.

     

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    Because colours are more noticeable in the corners where facets join together, Diamond Exchange recommends you select a princess cut diamond that has a colour grade of between D to H. For the most brilliance, Diamond Exchange suggests you select a princess cut diamond in one of the three top cut grades – Ideal, Excellent and Very Good.

     

    Emerald Cut

    With its long, clean lines, the emerald cut diamond is a beautiful and elegant alternative to the more traditional cuts. Its pavilion (bottom) is cut with rectangular facets, creating broader flashes of brilliance rather than fiery sparkles of light. Its crown (top) has a large open table, making colour/cut flaws and inclusions more visible to the naked eye.

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    Please note that emerald cut diamonds can also greatly vary in how rectangular they are. The length-to-width ratio of the diamond will determine how it will look when viewed from above. To calculate the length-to-width ratio, divide the length dimension by the width dimension (the width is expressed as 1). For a classic emerald shape, look for a length-to-width ratio that ranges between 1.30 and 1.40.

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    Because imperfections are all the more obvious with its wide crown, Diamond Exchange recommends you select an emerald cut diamond in the following cut, colour and clarity grades:

    Cut Grade: Ideal, Excellent or Very Good

    Colour Grade: D to H

    Clarity Grade: FL to VS2

     

    Asscher Cut

     

    Nearly identical to the emerald cut diamond, the main point of difference is that the Asscher cut diamond is square. Its pavilion (bottom) is cut with rectangular facets, creating broader flashes of brilliance rather than fiery sparkles of light. Its crown (top) has an open table, making colour/cut flaws and inclusions more visible to the naked eye.

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    Please note that Asscher cut diamonds are meant to appear square, so each should have a length-to-width ratio of between 1.00 and 1.05. To calculate the length-to-width ratio, divide the length dimension by the width dimension (the width is expressed as 1).

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    Because imperfections are all the more obvious with its wide crown, Diamond Exchange recommends you select an Asscher cut diamond in the following cut, colour and clarity grades:

    Cut Grade: Ideal, Excellent or Very Good

    Colour Grade: D to H

    Clarity Grade: FL to VS2

     

    Marquise Cut

     

    Beautiful and dramatic with its length and pointed ends, a marquise cut diamond can make fingers appear long and slender. Its shape can maximise carat weight, giving the impression of a much larger diamond. A variation of the round brilliant cut, it works in a similar way such that the better the cut, the more brilliant the diamond.

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    Please note that the shape of marquise cut diamonds can range from long and thin to short and wide. The length-to-width ratio of the diamond will determine how it will look when viewed from above. To calculate the length-to-width ratio, divide the length dimension by the width dimension (the width is expressed as 1). For a traditional marquise shape, look for a length-to-width ratio that ranges between 1.75 and 2.25.

     

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    Because colours are more noticeable in the corners where facets join together, Diamond Exchange recommends that you select a marquise cut diamond of a colour grade between D to H. For the most brilliance, Diamond Exchange recommends that you select a princess cut diamond in one of the three top cut grades – Ideal, Excellent and Very Good.

     

    Pear Shape

     

    An eye-catching cut, the pear shape diamond is also known as the ‘teardrop’ because of its one rounded end and other pointed end. Its unique shape makes it a popular choice for engagement rings and if you choose a more elongated pear shape, the length will create a subtle slimming effect on your finger.

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    Please note that pear shape diamonds can differ in dimensions so look for the length-to-width ratio. The length-to-width ratio of the diamond will determine how it will look when viewed from above. To calculate the length-to-width ratio, divide the length dimension by the width dimension (the width is expressed as 1). For a traditional pear shape, look for a length-to-width ratio that ranges between 1.45 and 1.75.

     

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    Because colours are more noticeable in the corners where facets join together, Diamond Exchange recommends that you select a pear shape diamond of a colour grade between D to H. For the most brilliance, Diamond Exchange recommends that you select a pear shape diamond in one of the three top cut grades – Ideal, Excellent and Very Good.

     

    Radiant Cut

     

    The radiant cut diamond is growing in popularity because of its versatility. It essentially combines the beautiful brilliance of a princess cut with its many facets, and the squarish shape of an emerald cut or an Asscher cut with its trimmed corners, to make up a truly unique and brilliant cut.

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    Please note that radiant cut diamonds can also greatly vary in how rectangular they are. The length-to-width ratio of the diamond will determine how it will look when viewed from above. To calculate the length-to-width ratio, divide the length dimension by the width dimension (the width is expressed as 1). For a square radiant shape, look for a length-to-width ratio that ranges between 1 and 1.05. For a more rectangular radiant shape, the length-to-width ratio should be greater than 1.10.

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    Because imperfections can be more obvious with its wide crown (top), Diamond Exchange recommends you select a radiant cut diamond in the following cut, colour and clarity grades:

     

    Cut Grade: Ideal, Excellent or Very Good

    Colour Grade: D to H

    Clarity Grade: FL to VS2

     

    Oval Cut

     

    A beautiful cut that sparkles almost as brilliantly as a round brilliant cut, the oval shape diamond is also becoming a popular choice because its length can accentuate long, slender fingers.

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    Please note that oval shape diamonds can differ in dimensions so look for the length-to-width ratio. The length-to-width ratio of the diamond will determine how it will look when viewed from above. To calculate the length-to-width ratio, divide the length dimension by the width dimension (the width is expressed as 1). For a traditional oval shape, look for a length-to-width ratio that ranges between 1.33 and 1.66.

     

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    For the most brilliance, Diamond Exchange recommends that you select an oval shape diamond in one of the three top cut grades – Ideal, Excellent and Very Good.

     

    Heart Shape

     

    Perhaps the most romantic shape for a diamond, the heart shape diamond traditionally serves as the ultimate symbol of love and is a popular choice for engagement rings.

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    Please note that heart shape diamonds can differ in dimensions so look for the length-to-width ratio. The length-to-width ratio of the diamond will determine how it will look when viewed from above. To calculate the length-to-width ratio, divide the length dimension by the width dimension (the width is expressed as 1). For a traditional heart shape, look for a length-to-width ratio that ranges between 0.90 and 1.10.

     

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    Because colours are more noticeable in the corners where facets join together, Diamond Exchange recommends that you select a heart shape diamond that has a colour grade of between D to H. For the most brilliance, Diamond Exchange recommends that you select a heart shape diamond in one of the three top cut grades – Ideal, Excellent and Very Good.

     

    Cushion Cut

     

    Popular for over a century now, cushion cut diamonds are cut with larger facets, increasing their brilliance and highlighting the diamond’s clarity.

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    Please note that cushion cut diamonds can also greatly vary in shape, from square to rectangular. To find the dimensions you want, look for the length-to-width ratio. The length-to-width ratio of the diamond will determine how it will look when viewed from above. To calculate the length-to-width ratio, divide the length dimension by the width dimension (the width is expressed as 1). For a square cushion cut, look for a length-to-width ratio that ranges between 1 and 1.05. For a more rectangular cushion cut, the length-to-width ratio should be greater than 1.15.

     

    Because inclusions can be highlighted with this cut due to its large facets, Diamond Exchange recommends that you select a cushion cut diamond that has a clarity grade of between FL to SI1. For the most brilliance, Diamond Exchange recommends that you select a cushion cut diamond in one of the three top cut grades – Ideal, Excellent and Very Good.

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    Should you have any further questions, simply fill in our contact form and a highly trained Diamond Exchange consultant will be in touch with you within three business days. For more urgent requests, please call 1300 929 888 or email us at sales@diamondexchange.com.au

     

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