Guide to buying Diamonds

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Guide to buying Diamonds

Buying a diamond for the first time can be a little overwhelming. So Hardy Brothers has created this Diamond Buying Guide to give you a better understanding of the choices available to you and to help make your experience an enjoyable and memorable one. In this guide, you will find information about diamond cutting and polishing, the characteristics of a diamond and what styles are available.

What is a Diamond?

Only Mother Nature can create something as exquisite as a diamond. Formed in intense heat and pressure deep under the earth over millions of years, diamonds are the hardest known substance and one of the rarest gems on the planet. Traditionally used in engagement and wedding rings, a diamond is the ultimate symbol of commitment, strength and love.

Diamond Cutting

Diamond cutting is the art of changing a diamond from a rough stone into a faceted stone. It is an extremely complex process requires considerable skill as well as specialised knowledge, tools, equipment, and techniques. After a diamond has been cut into shape, it is sent for polishing, where the facets are cut onto the diamond and then the final polishing is performed.

The Four C’S


One of the most important characteristics to consider when buying your new Hardy Brothers Diamond is ‘cut’. ‘Diamond cut’ refers to the angles and proportions created when transforming a rough diamond into a polished diamond. The first aspect of cutting is the actual physical shape of the diamond. By referring to the chart below you will be able to see most of the common shapes available.

The second aspect of cutting relates to the specific quality of cut within the shape. This relates to proportion, and the relationship and angles of each of the surfaces, known as facets. The quality and price will vary greatly based on the cut quality. By referring to the chart here you can see how - depending on the quality of the cut - the light refractions can be altered, affecting the shine of your diamond.


All diamonds fall within a range from ‘D’ (colourless) to ‘Z’ (light yellow). The higher or closer a diamond is to having no colour (D), the more valuable it becomes. This is due to the fact that the light refractions reflect off the white diamond and create a truly dazzling and sparkling stone. Diamonds can also be found in many different colours, known as ‘fancy’ colours. These colours include yellow, brown, pink and blue, and these diamonds are particularly rare and valuable. Refer to the chart below to see the colours available for your diamond.


The clarity of a diamond is most commonly known as ‘nature’s fingerprint’ or ‘birthmark’. The majority of diamonds contain ‘inclusions’, and the size or quantity of these depends on the clarity grading that the diamond is given. These inclusions are natural characteristics of a diamond (such as fractures or minerals), and most are invisible to the naked eye. The fewer inclusions in a diamond, the greater the clarity and the higher the value. The chart below will show you the clarity grading available in a diamond.


The carat of a diamond is actually a measure of its weight, not its size. Refer to the chart below to see what sizes are available for your new diamond.

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