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Crafted By Infinity

“Crafted by Infinity Diamonds appear bigger, whiter and cleaner than other diamonds of identical carat weight, color and clarity.”

Crafted By Infinity

“Crafted by Infinity Diamonds appear bigger, whiter and cleaner than other diamonds of identical carat weight, colour and clarity.”


Why CBI Diamonds?


Paramount quality

CBI produces the highest quality diamond cuts, engaging their passion and expertise to enhance all the natural assets of a diamond, making your diamond appear bigger, white and cleaner than diamonds of identical carat, colour and clarity.

Investment in the future

Exceeding known metrics, CBI diamonds are cut with the future in mind. Current internationally agreed cut grades are wide, allowing for enormous variation. With advances in technology and consumer knowledge the experts at CBI see a future where cut will be reported in finer detail meaning truly excellent cuts and high-performance diamonds are elevated in value above diamonds currently achieving the very minimum standards for the grade.


Stepping away from the modern demands of mass production, CBI produces a limited stock of just 1000 diamonds a year, allowing them to prioritise precision and consistency above all else.

About CBI

CBI are trailblazers in diamond cut

CBI produce diamonds which use advanced technology and expert knowledge to maximise their visible carat, colour and clarity.

CBI look beyond the certificate

They are leaders in diamond cutting and education and have developed their own, regimented standards which prioritise diamond performance and consistency.

From fine beginnings

At CBI they know that the best quality cut diamonds can only be achieved with the best quality source material. The uncompromising standards of a CBI diamond promises high performance and consistency, guaranteed to give your diamond superior scintillation, dispersion, brightness and contrast

Rarity vs Quality

When assessing diamonds, the universally accepted grading system takes into account the Four Cs but these can be separated into two value factors. A diamond’s rarity and diamond’s quality.


When assessing diamonds, the universally accepted grading system takes into account the Four Cs but these can be separated into two value factors; a diamond’s rarity and diamond’s quality. Rarity describes the fixed and unchangeable characteristics of a diamond. Diamonds of high size, colour and clarity command high prices because these characteristics are rare.


When it comes to cut, the level of quality is in our hands. Cut is dictated by the technology, skill and passion of the diamond cutter. The joy or disappointment experienced when looking at your diamond can be a direct result of just how expertly it was cut.


Finely cut diamonds tend to appear BRIGHT in a broad variety of lighting environments.


Fine makes tend to exhibit large amounts of FIRE when illuminated in fire-friendly lighting environments.



Fine makes do not have excessively large areas of light LEAKAGE.


Fine makes will have enough dark/light CONTRAST to be interesting, but not too much dark as to impact the brightness of the stone.

Proportion factors

Weight Ratio. Finely cut diamonds achieve a high level of performance without using excessive weight.

Durability. Fine makes are resistant to chipping.

Tilt. Fine makes do not exhibit the “fish-eye” effect.

Girdle. Fine makes do not have excessively thin or thick girdles, mostly due to durability/weight ratio concerns.

Culet. Fine makes do not have an excessively large culet.

(source AGS)

Finish factors

Polish. Finely cut diamonds should have a polish which does not interfere with light return. 

Symmetry. A finely cut diamond should have perfectly aligned and shaped facets. Traditional diamond grading reports on the average symmetry throughout the stone. Not satisfied with this CBI makes sure that every individual facet is cut to their exacting standards. 

CBI Diamonds FAQ


Are CBI diamonds more expensive than normal diamonds?

CBI makes no apologies for the small premium required to invest in one of their diamonds. CBI diamonds use the finest starting material, the most highly skilled cutters and most advanced technology, prioritising cut results throughout. Executing the calculated designs of their diamonds also means that they yield less carat weight from a rough diamond compared to an inferior cut, which makes the process of creating perfection more costly.

Are CBI diamonds a good investment?

Investment diamonds make up a very small proportion of diamonds traded and when creating an engagement ring, investment should never be a primary consideration. You’re probably looking to create an engagement ring as a symbol of love and commitment, not with the intention of selling it down the line. 

What’s the difference between CBI and Excellent/ Ideal cut diamonds?

Looking beyond a diamond certificate, CBI diamonds give you the security that your stone has been cut to a refined set of standards. Of the diamonds which are graded as Excellent even by a reputable grading laboratory, you can expect there to be significant and visible variation in light performance due to the wide guidance of this criteria. Until grading laboratories report on brightness, fire, leakage and contrast, choosing a specialist diamond from a brand committed to high performance is your best guarantee.

Why don’t diamond certificates report on light performance?

The cynical answer would be because they don’t want to. Diamonds have historically been cut to enhance their value according to a set of goal posts dictated by existing diamond grading criteria. If grading laboratories alter the criteria for cut it would mean that stocks of diamonds currently classified as the best possible cut, could be downgraded at a financial loss. A less cynical answer could be that certificates just don’t report on light performance yet. Growing markets such as China have already seen the demand for higher performing diamonds and as the market evolves reporting should catch up.


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