The David Morris Guide to Diamonds

The 4Cs

Symbolic of faithfulness and love, it’s little wonder that white diamonds have become the go-to stone for engagement rings, anniversaries, or indeed any act of love, and as the hardest mineral of all can easily be worn every day. The most important factor to consider when choosing a white diamond is ‘the 4Cs’ – Cut, Colour, Clarity and Carat. Developed by the Gemological Institute of America (GIA), the 4Cs is the globally recognised standard for grading diamonds.

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The way in which a stone is cut is paramount to its final appearance and value; each precise facet determining how it will interact with light and produce the scintillating shine that only a white diamond can. The master craftsmen of our Bond Street atelier, where all David Morris jewellery is made, are amongst the world’s most accomplished in amplifying a diamond’s beauty.


A diamond ‘carat’ indicates how much a diamond weighs, and therefore its apparent size. The value of a diamond varies according to its number of carats and its rarity, as well as taking into account how it is graded in relation to the remaining of the 4Cs. As a guide, one carat is the equivalent of 0.2g.

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Colour, or a complete lack thereof, is an all-important attribute when searching for an exceptional diamond. The most prized white diamonds are completely colourless, or very close to it, and are graded from D at the top of the scale, to Z. With each diamond hand selected by Jeremy Morris, the majority of our diamonds range from grades D to F – the highest standard.


With diamonds exposed to intense heat and pressure during formation, it is incredible that any should emerge flawless. Yet, at the House of David Morris we are adept at sourcing them. The majority of our diamonds are graded ‘Flawless’– they possess no inclusions and blemishes, even when scrutinised under magnification – but we may also select diamonds with minute inclusions that are undetectable to the naked eye.

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