How to choose your perfect diamond


How to choose your perfect diamond

Choosing your perfect diamond

Diamonds come in all shapes and sizes, and there is sure to be one to suit your taste, style and budget. When choosing a diamond, there are a number of important aspects to be considered, commonly known as the four Cs: colour, clarity, cut and carat.


Diamond Colour

Diamond Colour Scale | David Law Jewellery

Diamond Colours

Diamonds are graded by colour – in most cases, the more colourless the diamond, the higher its value. The exceptions to this rule are the fancy coloured diamonds, such as pinks, yellows and blues.

GIA is the industry standard for measuring diamond colour. The letter D represents the most colourless diamonds, ranging up to the letter Z for a light yellow or brown diamond.

As you can imagine, colour grades are judged under controlled lighting and precise viewing conditions.

Diamond Clarity

Diamond Clarity Scale | David Law Jewellery

Clarity is a measure of the flawlessness of a diamond, and the clarity rating affects the beauty and price of each stone.

Virtually all diamonds have some imperfections known as inclusions and blemishes.

The industry standard rates all gem-grade diamonds on a scale from FL for flawless, to I3 for heavily included.

A diamond is described as ‘flawless’ if no external imperfections or internal flaws are visible under 10-power magnification. This is extremely rare – and impacts the price accordingly.

Diamond Cut

Diamond Cut Types | David Law Jewellery

Types of Cut on Diamonds

Diamonds with all specifications types | David Law

The most critical of the four Cs is the cut of your diamond, as it not only governs its shape, but also the fire, life and brilliance it displays.

Diamonds are carefully cut and polished to emphasise the stone’s brilliance. Traditional diamond shapes include: Brilliant, Princess, Oval, Marquise, Pear, and Emerald.

A diamond should work like a mirror, capturing the light and reflecting it from one facet to another before sending it back to the crown of the stone.

(The middle diagram shows how the light ideally bounces around when a diamond is cut well.)

Diamond Carats

The different Carat Sizes in Diamonds | David Law

The weight of a diamond is measured in carats. One carat is equivalent to 0.200 grams – but weight along doesn’t determine the diamond’s value.

When you compare two diamonds of the same weight, the value depends on the quality of each stone.

When you compare two diamonds of equal quality, the larger stone will usually hold considerably more value. Usually, a two-carat diamond will be worth more than twice as much as a one-carat stone.


Diamond expert, David Law

David Law has been buying and selling diamonds since the early 1980s.

When you entrust him to select a diamond for you, he will consider the four Cs among many other factors to ensure you experience the WOW factor when you first glimpse the choice of stones he’s personally selected for you.

All David’s diamonds are presented with a GIA certificate, giving you reassurance that they meet the highest standard of reliability, consistency and integrity.

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Contact David today to arrange an informal conversation or make an appointment. He’s available 7 days a week, and can meet you in any one of 15 locations across London, or online via Skype. The initial consultation is at no charge and with no obligation.

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