The Anatomy of a Diamond

At Rohan Jewellers, we are meticulous about the quality of diamonds that we responsibly source. We go beyond the 4 C’s and hand select only the finest of stones to craft into heirloom worth pieces.

Formed over billions of years deep within the Earth’s mantle, natural diamonds are a true treasure and a marvel of the Earth’s formation and history. Their journey to the surface, marked by the bonding of carbon atoms through intense heat and tremendous pressure, results in a unique crystal lattice structure giving diamonds their facets and enduring reputation.



Cut is one of the most important elements when assessing the diamonds we use at Rohan Jewellers. Cut refers to the angles and proportions of the diamond, which determine how a diamond’s facets interact with light. Essentially, it’s how sparkly and bright your diamond is.

Not only does cut lend itself to the unique design of your jewellery piece, but a well-cut diamond will have high brilliance. The brilliance of a diamond refers to the combination of white light reflected and refracted both internally and externally from the stone’s facets.

The different facet shapes of each cut result in an array of scintillation patterns due to the symmetry, contrast, and face-up pattern of the diamonds facets.

Round Brilliant, Oval, Cushion, Pear, Emerald, Princess, and Marquise are the most common diamond cuts. With creativity and originality at our core, we work with many fancy-cut diamonds. Cadillac’s are one of Master-Craftsman Rohan’s favourite cuts for adding Art Deco inspired details to his designs.

COLOUR – Beyond the White Diamond

Although it’s hard to beat the pure simplistic beauty of a sparkling white diamond, there is so much more beyond that in the world of coloured diamonds.

Colour is the presence or absence of colour within the diamond. While diamonds are typically thought of as clear or colourless, they can range from bright white to yellow or champagne.

The colour scale for diamonds starts at ‘D’ for colourless stones and continues with increasing presence of colour to ‘Z’.

Colour is a significant factor in determining a diamond’s value and appearance. Colourless diamonds are generally rarer and more valuable as they allow more light to pass through, resulting in greater brilliance and sparkle. However, the presence of colour can also enhance a diamond’s beauty, especially in fancy-coloured diamonds such as pink, blue, or yellow, which are sought for their vibrant hues.

Coloured diamonds are evaluated based on their hue, tone, and saturation. The more intense the colour, the more valuable the diamond.

Rohan Jewellers are honoured to be a select Argyle Pink Diamond Atelier to some of the rarest stones in the world. We also house an incredibly rare and historic collection of sunshine yellow diamonds from the Ellendale mine.

CLARITY – The Key to Flawless Diamonds

The clarity of a diamond is evaluated by the presence of internal and external imperfections, known as inclusions and blemishes.

The scale for clarity ranges from ‘F’ for a flawless stone, to ‘I3’ for a stone with very obvious inclusions.

Inclusions are natural and inevitable as they occur during the diamond’s formation process deep within the Earth. Due to the rarity of a ‘flawless’ stone with little to no inclusions, high clarity influences the value of the stone.

A higher clarity doesn’t equate to more sparkle (although it helps). VVS2 clarity and above requires high powered magnification to see the inclusions and are extremely rare. We carefully inspect and select our diamonds to ensure that they have no visible inclusions to the naked eye and that their value works for your budget.


Rohan Jewellers symbolises trust and is renowned for unwavering quality, integrity, and unparalleled creativity. To explore, invest, or incorporate a diamond into a custom design, contact us at [email protected] or call 9242 1155. Embark on a journey into a world of sophistication enduring elegance with Rohan Jewellers.