Diamond Shape or Cut

Shape is the reference to the outline of the diamond. All diamond shapes have specific attributes and recommended proportion or angle relationships.

These are critical to the look and light performance of the stone.

Is there a Best Diamond Shape

Due to scientifically proven proportion grades, Round diamonds have properties unique to the shape. Life, Luster, fire, sparkle and brilliance are common in all shapes.

Proportion is unique and this gives the round stone a more comprehensive description. However, it does not make it better.

Fancy shaped diamonds include all stones, which are not round. Princess, emerald, pear, oval, marquise and cushion to name only a few.

These shapes have become more popular due to lower cost per carat, and broad Jewellery style options.

These distinctive shapes cost more to produce but due to higher weight recovery generally cost less than rounds of the same carat weight and grade.

This makes sense if you have set a budget but want a larger stone. Ultimately the diamond shape that suits your taste comes down to personal choice.

Does Diamond Shape relate to Diamond Cut

While shape and cut can be used in the same sentence to describe the stone, the meaning is very different.

Jewellers and other industry professionals may use the terms interchangeably.

The cut is the make or proportion of the diamond. GIA use a cut grade where IDC laboratories use a scientific proportion grade.

Shape refers to the outline of a not to the faceting, proportions, dimensions and overall reflective qualities that result in fire, luster or the diamonds sparkle.

Fancy Cut Length to Width Ratio

Diamond length to width ratios are dimensions. This may in some cases show as feature called a bowtie (this light leakage sometime seen in pears or Marquise shapes).

There is no laboratory definition of an ideal ratio, but there are preferred symmetries, depending on the shape. In the end, the ratio remains a personal choice.

Diamond Shape and Effect on Diamond Colour

Some diamond shapes are brilliant cuts some are stepped or a mixture of both. Brilliant cuts have facets running from the girdle (or outer rim) to the culet (point at the bottom).

These stones handle light differently and therefore can dissipated whiter colours or accentuate deeper fancies colours.

Round brilliant diamonds reflect more light, which means more colour hidden by the brilliance.

Diamond Cut and Clarity

The characteristics of some fancy shapes, which are known as step cuts, (emerald, Asscher etc), require a higher clarity grade compared to brilliant cuts to mask even very small inclusions.

Shape Affects Price

Shape directly influences price. Round diamonds lose more weight in production around 50 percent.

Fancy shapes in most cases will have a high recovery up to 75 percent, this directly relates to the price difference.

Variety of Shapes of Diamond

In 1919 the original Tolkowsky Ideal Cut was developed using advanced theories of light path through the diamond crystal.

Since this development, diamond cutters have used these calculations to optimize, the separation of the fire and brilliance.

The diamond symmetry of a round diamond allows for a wider flexibility when balancing cut, colour, and clarity grade while still optimising the fire and light return or brilliance.

While the classic diamond is a sparkling Round gem of brilliance, we also offer the finest, non-round or ”fancy-shaped” diamonds.

No less desirable than round diamonds, fancy shaped diamonds are a testament to a diamond cutter’s skill in crafting sheer brilliance in a variety of beautiful forms.


According to legend, the first Marquise diamond was commissioned by Louis XV commissioned to resemble the mouth of his chief mistress, Marquise de Pompadour. The elongated shape of the marquise diamond maximises carat weight giving you a much larger-looking diamond. It’s beauty is further enhanced when set with round or pear-shaped side stones.


Also known as teardrop-shaped, the unique shape of pear-shaped diamonds make them a popular choice for pendants and earrings. Elongated pear-shaped diamonds complement hands with small or average-length fingers creating a subtle slimming effect.


With its pointed corners and square shape, the princess-shaped diamond has fast become a popular choice for engagement rings. Customised to your taste of either square or rectangular, the beauty of the princess-shaped diamond is magnified when paired with long and slender fingers.


It would be difficult to argue against the heart-shaped diamond being the ultimate symbol of love. And what’s more, the unique shaped of the heart would make heart-shaped diamonds the ultimate, personalised symbol of your love.


This triangular-shaped diamond, as the name suggests, was first introduced by the Asscher brothers in Amsterdam in 1962. The option of sharp or rounded corners becomes available.  Trilliant-shaped diamonds have been described as a scintillatingly brilliant shape of fire.


Similar to round diamonds, oval-shaped diamonds are even, symmetrical and perfectly balanced. Quick tip: They are the perfect choice for small hands as the shape creates the illusion of elegantly long fingers. 


As the name suggests, emerald-shaped diamonds are named after the shape of their cousin - the emerald. Emerald-shaped diamonds have become quite popular for being economically priced while adding an elegance and sophistication to any piece of jewellery