Diamond Shapes

What shapes diamonds come in and how those shapes affect value and appeal.

Before buying yourself the perfect pink diamond investment or diamond jewellery, it is important to explore and understand what shapes of diamonds are available because this will further determine which shape suits your personality or investment intentions. 

We all know that diamonds are a girl’s best friend – as the saying goes – but they really are for everyone these days. No matter the occasion, diamonds are always the perfect accent to add to any outfit or to wear as part of your permanent look. Whether it’s an engagement ring or a beautiful tie clip – diamonds are a small sparkling piece of joy in everyone’s day, and none more so than a coloured diamond like those in the pink, blue and red categories. They have also become especially safe investment options, and people of all types are now falling love with diamonds.

What does ‘diamond shape’ mean?

The shape of a diamond is one of the most important considerations when buying one. There is a wide range of shapes available for you, as diamond ring makers have explored the possibilities of the stones over the centuries.  

Some people get confused between diamond shape and diamond cut. A diamond’s shape refers to the outer shape of the diamond when you have a look at it. It can come in various shapes such as round, oval, spherical, or princess. Your perfect shape must be decided based on several factors, including the style you want, the shape of your finger and the design that looks best on it, how valuable the shape of the diamond is for resale purposes, and how the shape accents the other value factors – clarity, carat, and colour.

The cut of a diamond is chosen by the gem cutter to best accentuate those value factors. It will be closely assessed both by computer scanning technology and a master gem cutter to determine which diamond shape will bring out the best of its clarity and colour, while maximising its carat weight. The diamond’s cut refers to the proportion, symmetry, cutting, and polishing of the diamond, along with the sparkle or light it emits which is officially referred to as scintillation and fire, respectively.

Diamond Shapes - Diamond Shapes

What are the different shapes of a diamond?

There are several shapes of diamonds. Some of the most popular ones are given below: 


One of the classic shapes of a diamond is the round, or brilliant, diamond. It is one of the first choices of most diamond admirers for their rings and pendants. In short, you can never get bored of them. Even for a diamond engagement ring, it the best choice. This kind of diamond is cut in a manner so that it emits light or sparkles in return, which adds to its brilliance. This is the most common choice for an investment diamond, due to its high level of resale value. 


These are also known as pillow cut diamonds. A cushion-shaped diamond comes with equal sides and is one of the best-selling shapes of diamonds. Many jewellery makers give it rounded ends or corners. Rounded ends give it a timeless aesthetic, and create more opportunities for jewellers to get creative with settings, like adding engraving or filigree details. Since it is proportioned exquisitely, it looks good on most people. It looks antique and truly royal and that is part of why it is known for its stunning appeal.  

Rectangular or Emerald

A large rectangular diamond, there is a pure elegance and sleekness to this style of cut that makes it an enduring choice and favourite. It gives a slender look to the finger and allows the diamond to exhibit more colour and clarity. As a well-respected choice in diamond cut, they make excellent investments as heirloom jewellery or as part of an investment portfolio. 


A feminine kind of diamond that comes with a crown, which gives it the name ‘princess’ cut. It was created in the year 1960, and quickly became very famous due to the kind of brilliance it offers. It is very popular for engagement rings because it is stylish and delicate at the same time, which suits a wide range of women’s style choices. It has a lot of sparkles, and hence, it is a perfect choice where jewellery is considered.  


Pointed oval-shaped diamonds look both elegant and dramatic. This unusual diamond shape is one of the most sought-after designs. It suits contemporary engagement rings, and its elongated shape will certainly bring a smile to any diamond-lover’s face. Its particular silhouette also makes it look large as compared to the other shapes of a diamond with the same carat. 


A heart-shaped diamond is an iconic buy. Though they are a very niche style, it is this uniqueness that gives them their great appeal. Their whimsical shape brings to mind times of levity, and they bring light-hearted joy to their wearers. They are often cut this way when a diamond is of an unusual rough shape, and heart cut gets the absolute best out of the diamond. Getting the heart-shaped diamond in a solitaire ring is one of the best decision you could ever make, as the solitaire setting emphasises the heart shape of the diamond.  


Unlike other shapes, this one is named after its original creator. It has a square shape; in fact, it is called a square emerald by GIA. The difference is that it has a higher crown and a smaller table. It produces more shine and brilliance than the emerald-cut diamond. 


This cuboid shape enjoys the best of both worlds – an emerald rectangular design and the classic round shape of diamonds. This shape of diamond looks somewhat triangular while providing depth to the diamond, bringing out its beauty even more. 


If you do not have something exquisite and unique in your jewellery collection, buying a pear-shaped diamond is the best way to remedy that. It will add elegance to your hand and attract all the attention around. Many people wonder how pear-shaped diamonds should be worn, for example, pointing towards the body or the tip of the finger. However, there is no set rule. Wear it the way you find it best. If it points towards the fingertip, it can give a slender look to the finger.  


The marquise-shaped diamond comes in a tapered cut form. It looks as if two semi-circles are connected. If you are looking for something elegant and sophisticated that can also lengthen your finger, go for a marquise-cut diamond – without a doubt. Its name came from the 18th century when courtiers wore marquise diamonds to flaunt their rank. Within this diamond’s shape, the stone looks larger than actually it is.  


A trillion-shaped diamond, also known as triangle-shaped stone, has three straight or slightly curved sides of equal length and 31 or 50 facets. Though this shape is not as popular as round diamonds, if you are looking for something different, then you should choose a trillion-shaped diamond. This stone can be used as a side accent stone as well as the centre diamond. 


A baguette-cut diamond has a rod-like shape that comes with 14 facets. It can either be rectangular or trapezoidal in shape. Many people get confused between emerald and baguette, but both are very different. Baguette cuts have a significantly narrower, more elongated shape than emerald cuts and they are usually used as side stone and ideal for a ring, bracelet, brooch or necklace. 


Fancy shaped diamonds can be a fantastic way to create a piece that will enhance any ensemble. Fancy shapes can also provide an opportunity to obtain a larger weight in terms of carat without having to make any sacrifice in terms of colour or clarity. Make sure you pick a cut that is known for concealing inclusions.

How diamond shape affects price

It might be interesting for you to know which shape of a diamond commands a heavier price, both for budgeting reasons and investment reasons. If you want to stay in budget for your engagement or jewellery purchase, you’ll know what to expect. If you’re looking at investment options, they you’re probably going to make slightly different choices based on their possible resale value and return on investment.

Round-shaped and marquise shaped diamonds are the most expensive, with oval shaped diamonds, pear shaped diamonds, and heart cut diamonds following next. The least expensive diamonds are cushion shaped, emerald shaped, and Asscher shaped diamonds. 

If you are seeking a reliable gemmologist that can offer you the perfectly shaped pink diamond at a competitive price, then get in contact with Argyle Diamond Investments Pty Ltd today. We specialise in guiding our clients through all kinds of sales, and as a certified supplier of pink Argyle diamonds – we really know our stuff.