The 4C’s: Our five-minute guide to decoding diamonds

The 4C’s: Our five-minute guide to decoding diamonds
  Model wearing Astley Clarke Comet Diamond Drop Earrings in solid 14ct Gold  

Let’s get some clarity...and cut, carat and colour! The 4C’s were set up in the 1940s to universally determine a diamond’s value. But what do they mean and is one more important than another?

The 4C’s are used to define the quality of a stone. No C is more important, they all work together to maximise a stone’s beauty.


Under the spotlight

Astley Clarke Diamond Cocktail Rings in solid 14ct Gold Diamond Grading: Colour

Image Source: GIA


Colour: There are 23 grades, starting from D – colourless – to Z, a warm white with hints of yellow. D isn’t better than Z, just different.

Astley Clarke Honeycomb Diamond Icon Photo Locket Necklaces in solid 14ct Gold

Cut: Stones are assessed by eye to determine what facets need to be cut into the stone to maximise sparkle. A good cut unlocks the stone’s potential.

Astley Clarke Icon Nova Diamond Pendants in solid 14ct Gold  

Carat: This indicates what the stone weighs with one carat equalling 200 milligrams. A high carat number does not always equal a better stone.

  Astley Clarke Diamond Icon Aura Stud Earrings in Solid 14ct Gold  

Clarity: Inside a diamond is traces of its origins, minerals or uncrystallised carbon, called inclusions. Fewer inclusions mean the refraction of light isn’t corrupted.


Something to smile about

Model wearing Astley Clarke Diamond Comet Lariat Necklace in solid 14ct Gold

Diamonds are rare and exceptional but that doesn’t mean they should be kept in a jewellery box. Add sparkle to your everyday with our precious-stone pieces.

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Princess or pavé? Signature or statement? Visit our new flagship store and we’ll help you decide which diamonds to showcase this festive season...whether you are gracing or gifting them.