Diamonds have long been admired for their extraordinary beauty, but what truly sets them apart is their brilliance. Whether you’re investing in a diamond engagement ring, a statement necklace, or a pair of earrings, understanding diamond brilliance is essential in making an informed choice for your jewellery collection, especially if it is for a special occasion or a gift for a loved one. In this luxury guide, we’ll delve into what diamond brilliance is, how it’s measured, and what makes a diamond truly brilliant.
What is diamond brilliance?
Diamond brilliance refers to the amount of light that a diamond reflects. This visual effect is what gives a diamond its signature sparkle, making it stand out from other gemstones and offering that luxurious, glamorous appeal. The brilliance of a diamond is determined by how well it interacts with light. When light enters a diamond, it’s refracted (bent) within the gem, and then it reflects off the facets to return to the viewer’s eye. The higher the quality of this interaction, the greater the diamond’s brilliance.
A diamond’s brilliance is also influenced by several key factors, including cut, symmetry, and light performance. Together, these elements work to enhance the sparkle and radiance of a diamond, ensuring it dazzles from every angle.
How is diamond brilliance measured?
The 10x magnification test: When examining a diamond under 10x magnification, experts look for specific signs of cut quality, such as perfect symmetry and well-proportioned facets. While this test won’t directly measure brilliance, it helps assess how well the diamond will reflect light once it’s set in jewellery.
Light Performance: Light performance is a comprehensive measure of how well a diamond handles light, including brilliance, fire (the dispersion of light into rainbow colours), and scintillation (the flashes of light seen when a diamond is moved). High-quality diamonds will show optimal light performance with a balance of brilliance and fire.
BrillianceScope: Some jewellers use sophisticated technology, such as the BrillianceScope, to measure a diamond’s brilliance. This device assesses how a diamond reflects and transmits light, giving a numerical value to its brilliance.
Hearts and arrows: A high-quality round brilliant diamond often displays a “hearts and arrows” pattern when viewed through a special scope. This optical phenomenon indicates that the diamond has been cut with precise symmetry, contributing to its brilliance.
Diamond proportions
Diamonds are cut with a specific set of proportions that aim to optimise brilliance, with the most famous diamond cut, the round brilliant, typically having 58 facets, all strategically placed to maximise light return. For a round brilliant diamond, ideal proportions will include a specific depth percentage (the height of the diamond) and table percentage (the flat surface on top of the diamond). Too shallow or too deep a cut can result in light leakage, reducing the brilliance.
Other popular cuts, like the princess, emerald, and cushion cuts, also have specific proportions that influence their brilliance. It’s important to understand how the proportions of the cut relate to the diamond’s overall sparkle when selecting the perfect stone.
How diamond brilliance is affected by diamond shape
While the round brilliant cut is the most renowned for its brilliance, diamond shapes such as the oval, emerald, princess, and cushion also display varying degrees of brilliance. Understanding how different shapes influence brilliance can help you select a diamond that meets your personal aesthetic preferences while still offering exceptional sparkle.
Round brilliant cut
The round brilliant cut is by far the most popular shape when it comes to brilliance. With its 58 facets, it’s specifically designed to optimise light performance, giving it the most brilliant sparkle. This cut is perfect for those who want a timeless, classic diamond with maximum brilliance and can specifically be found in engagement rings, eternity rings and gift jewellery.
Princess cut
The princess cut is the second most popular shape and is often chosen for its square or rectangular shape. It has fewer facets than the round brilliant, but its sharp corners and pavilion (the lower part of the diamond) can still produce excellent brilliance, creating a diamond which is both subtle and alluring.
Cushion and emerald cuts
The cushion cut and emerald cut, though they may not achieve the same level of brilliance as the round or princess cuts, have a unique appeal. The cushion cut combines a square shape with rounded corners, and its large facets offer a vintage look while still showcasing a moderate level of brilliance. The emerald cut, with its step-cut facets, doesn’t reflect as much light, but it creates a sophisticated, elegant effect that many luxury buyers appreciate for its clarity and fire rather than its brilliance.
Brilliant Diamond Jewellery, Handcrafted by David Morris
Located on Bond Street London, David Morris is home to some of the rarest, pure diamonds. Handcrafted into statement high jewellery and scattered through our fine jewellery pieces, we have a selection of white diamonds and coloured diamonds, each one possessing the beauty and originality of a pure natural diamond. Crafted into wedding jewellery, bespoke designs and magnificent high jewellery pieces, our diamonds are the epitome of luxury.
To discover the world of David Morris diamonds, get in touch with one of our diamond experts or book a consultation at one of our boutiques for our unique viewing experience.