CUSTOMER SERVICE: +44 (0) 800 644 0625
Zoe Kay Jewellery

Diamond Buying at Zoe Kay Jewellery

The 4Cs

When you buy a diamond, the 4Cs - colour, clarity, carat and cut - are the four most important things to think about. It is the way that the 4c's relate that gives value and beauty to your diamond.

Diamond Colour

Diamonds appear colourless but actually contain subtle shades of yellow or brown. The closer a diamond is to having no colour, the more valuable it is. This is because the light can shine through it freely to make it truly sparkling.

At Zoe Kay Jewellery we use the GIA (Gemological Institute of America) scale of colour. On this scale, diamond colour is graded from D, classed as colourless, through the alphabet to Z, which has a light yellow colour.

Diamond Clarity

When light enters a diamond it is reflected around the gem and then back out again. Small inclusions or internal marks within the diamond can affect this flow of light. Hardly any diamond is totally clear, however the fewer inclusions in the diamond, the greater the clarity and the more valuable it is.

Diamond Carat

Carat is the weight of a diamond and does not necessarily reflect its size. Larger carat weights are rare and more valuable than lower carat weights. However, the value of a diamond can also be affected by the colour, clarity and cut of the diamond.

Is Carat the Same as Size?

One diamond may look bigger than another but, in fact, weigh less. It is worth taking your time to find the right diamond jewellery with a setting that optimises its size, beauty and brilliance. A good cut and certain settings can make a diamond appear larger than its actual carat weight, so don't just look at the carat weight, but take other things, such as setting and cut into consideration when choosing your diamond.

Diamond Cut

Cut and cutting styles work together to enhance a diamond's brilliance. There are three main cutting styles, each of which has its own facet arrangement: Brilliant cut, Step cut and Mixed cut.

In cutting a diamond to be worn as jewellery even a highly skilled diamond cutter might have to cut away more than half of the rough diamond. However the end result will be a beautiful gem ready to be worn as jewellery.

When a diamond is well cut, in good proportion, it will maximise the effect of the light travelling through it, allowing it to be dispersed and reflected from one facet to another. This releases its brilliance, fire and beauty. However, if a diamond is cut too deeply, light will escape through the sides, causing it to appear darker and less brilliant than it might be. On the other hand, if a diamond cut is too shallow, light escapes through the side or the underneath and it won't be as dazzling.

Diamond Shapes

The shape of a diamond refers to its outline when it is viewed from above and is usually known as cut. The shape, or cut, of a diamond is usually determined by the original shape of the rough stone, the location of any inclusions and the carat weight of the stone.