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Diamond Shape
Brilliant Cut (Round) (7)Brilliant Cut (Round)
Cushion Cut (0)Cushion Cut
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Clarity
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Brilliant Cut

One of the most popular cuts of diamond, a round brilliant cut diamond delivers incredible sparkle and beautiful refractions of light from each facet.

It is considered the most sparkly of diamond cuts and its symmetrical shape allows it to maximise all its qualities.

The history of Brilliant cut engagement rings 

The pattern of facets was devised by Marcel Tolkowsky, a Belgian maths student whose family owned a diamond business. In 1919 Tolkowsky published his thesis, "Diamond Design: A Study of the Reflection and Refraction of Light in Diamond". He had looked at the way that light is reflected within a diamond, and designed the round brilliant cut to optimise the combination of 'fire' (refraction of light into different colours) and brilliance (reflection of white light). A well made round brilliant cut diamond will also exhibit exceptional scintillation (sparkle), which jewellers call 'life'.

Unlike an old cut, the proportions of a modern round brilliant are tightly defined. If a stone deviates far from the theoretical ideal, it won’t score a high ‘cut grade'. For example, if a stone has been cut too deep or too shallow, light will tend to ‘leak’ out of the back of the stone, and it won’t sparkle as well as it should do. 

Considering that most diamonds are sawn (in the sawing process, a bronze blade impregnated with diamond dust spins at high speed to gradually cut through the stone) and that to saw through a one-carat diamond might take eight hours, followed by all the faceting, it can be said that to create a perfectly cut brilliant cut diamond will take a long time!

The purpose of faceting is to let light pass through and be reflected and refracted from faces on the back of the stone and back out of the front of the stone - this is called internal refraction. 

Faceted cuts are precisely designed to show off the gem to best advantage, and the brilliant cut is the best example of this process working.

We are also particularly proud of our extensive selection of GIA certified diamonds, which take centre stage in some of our most popular classic engagement ring designs. The quality of these exquisite diamonds are registered by the Gemmological Institute of America – a laboratory that is considered one of the most respected and reliable within the diamond industry.

The GIA are known for their unbiased diamond grading, together with their consistency. Our GIA certified engagement rings are the most highly valued in the industry, and are prised for their clarity, colour, polish and dimensions, along with many other characteristics. 

Browse our range of brilliant cut engagement rings below. Still not sure where to start? Speak to one of our expert team members using our live chat option or get in touch to book an appointment at our boutique london showroom based in Hatton Garden and speak to one of our qualified gemologists. 

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Brilliant Cut Engagement Ring 1.00ct - I VS2 - GIA

Brilliant Cut Engagement Ring 1.00ct - I VS2 - GIA

Price: £7,500.00
A handcrafted platinum ring, 6 claw set with a single 1.00ct round brilliant cut diamond graded I VS2 by GIA. The shoulders featuring alternate round brilliant and baguette cut diamonds in milgrain settings.
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Ophelia - Diamond Set Heart Collet Engagement Ring

Ophelia - Diamond Set Heart Collet Engagement Ring

Price: £8,755.00
An elaborate Edwardian style platinum ring, the centre eight claw set with a certified brilliant cut diamond with a guaranteed minimum carat weight of 1.00ct and a grading of at least H VS2. The gallery decorated with hearts each grain set with old cut diamonds, with further old cuts set to the profile and shoulders. The mount containing approximately 0.20cts of diamonds.
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Clarice - Diamond Square Shoulder Engagement Ring

Clarice - Diamond Square Shoulder Engagement Ring

Price: £8,755.00
A stylish Art Deco style platinum ring the centre square set with a certified round brilliant cut diamond weighing with a guaranteed minimum of 1.00ct and graded H VS2 at least. The central stone flanked by two squares milgrain set with small old cuts with reeded engraving to the shank and profile. The mount bearing approximately 0.10cts of diamonds.
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Coralie - Ornate Diamond Set Engagement Ring

Coralie - Ornate Diamond Set Engagement Ring

Price: £8,755.00
A highly intricate Edwardian style platinum mount the centre four claw set with a certified round brilliant cut diamond weighing a guaranteed minimum of 1.00ct and graded H VS2 at least. The pierced gallery with sweeping festoons set with old cut diamonds, the cheniers set with further old cuts.

The shoulders of this highly wrought mount grain set with larger old cuts and decorated with foliate engraving and milgrain detail. The mount containing 0.20cts approximately.

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Fleur - Vintage Diamond Set Engagement Ring

Fleur - Vintage Diamond Set Engagement Ring

Price: £8,755.00
A highly intricate Art Deco style platinum mount the centre set with a certified round brilliant cut diamond weighing a guaranteed minimum of 1.00ct and graded H VS2 at least. The ornate, pierced gallery milgrain set with old cut diamonds. The shoulders of this highly wrought mount decorated with engraving and interestingly, the centre stone is semi-rubover set and secured by two claws modelled as fleur de lis.
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Fontaine - Step Down Baguette & Old Cut Diamond Engagement Ring

Fontaine - Step Down Baguette & Old Cut Diamond Engagement Ring

Price: £8,950.00
A sleek Art Deco style platinum ring, the centre four claw set with a certified brilliant cut diamond with a guaranteed minimum carat weight of 1.00ct and a grading of at least H VS2. The shoulders with step down baguette cut diamonds with three graduating old cut diamonds grain set to each shoulder granting an approximate total carat weight of 1.22ct.
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Allete - Double Bullet Vintage Diamond Engagement Ring

Allete - Double Bullet Vintage Diamond Engagement Ring

Price: £8,985.00
A bold Art Deco inspired platinum ring, the centre four claw set with a single certified brilliant cut diamond weighing a minimum of 1.00ct with a minimum quality of H VS2. The central stone flanked by a duo of rub-over set bullet cut diamonds with further diamonds set to the shoulders. The mount containing approximately 0.35-0.40cts of diamonds.
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Ornate Platinum Diamond Dress Ring - 1.28ct - HSI1

Ornate Platinum Diamond Dress Ring - 1.28ct - HSI1

Price: £9,000.00
A handcrafted platinum ring square set with a single 1.28ct round brilliant cut diamond graded HSI1 by HRD. The shoulders formed of an intricate interlocking lea motif, grain set with round brilliant cut diamonds. All settings milgrain finished.
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Vintage Brilliant Cut Engagement Ring 1.35ct FSI2 GIA

Vintage Brilliant Cut Engagement Ring 1.35ct FSI2 GIA

Price: £9,270.00

A vintage style solitaire engagement ring, featuring a sparkling brilliant cut diamond weighing 1.35ct. The classic centre stone is graded FSI2 by GIA and secured by four claws. It is set in a handcrafted platinum mount studded with glittering old cut diamonds set on the side of the setting and down each shoulder with intricate filligree detailing.

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Reine - Rub-Over Set Bullet Diamond Engagement Ring

Reine - Rub-Over Set Bullet Diamond Engagement Ring

Price: £9,285.00
A bold and architectural Art Deco style platinum ring, the centre rub-over set with a certified brilliant cut diamond with a guaranteed minimum carat weight of 1.00ct and a grading of at least H VS2. The central stone flanked by two rub-over set diamond bullets with an outer trim of old cut diamonds amounting to an approximate total carat weight of 0.42ct.
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