The Compact Guide to Understanding Fancy Diamond Categories

Diamond pieces

Only a few precious stones beat the brilliance of diamonds. When shopping for a diamond, there are various elements to reflect on, but the “4 Cs” are the most important. These denote the diamond’s cut, clarity, colour and carat weight.

Diamonds come in various colours. The designation “fancy diamonds” refers to the natural diamond colour rather than a calibrated grade. When shopping in Hatton Garden’s jewellery shops for your ideal fancy diamond, you will find them grouped into a slew of categories.

Here are the three primary classes of fancy diamonds:

Type I Diamonds

This is created by the addition of nitrogen into the carbon element in diamonds. The nitrogen’s addition results in orange and yellow-coloured fancy diamonds, and sometimes, pink and green ones. Type I diamonds are categorised as type Ia and Ib. Type Ia diamonds contain nitrogen in platelet form, while Ib diamonds have dispersed nitrogen.

Type II Diamonds

These are extremely rare diamonds and are 100 percent nitrogen-free. Their colour is mainly caused by pressure which compresses the carbon and results in purple, red and pink hues. The diamonds are categorised into types IIa and IIb. The purest diamonds are type IIa, while type IIb contains boron atoms in their near-pure carbon structure. The boron element results in the blue hue of type IIb diamonds and makes these the rarest of all the fancy diamonds.

Type III Diamonds

These are thought to be of meteoric origin. Type III diamonds have a hexagonal structure, unlike others that have a cubic one. They are commonly available in a green hue.

Coloured diamonds have been an attraction for men and women for centuries with the most famous being the dark blue hope diamond. They are, however, no longer exclusive to royalties. From the categories of fancy diamonds above, there are various diamonds to suit everyone’s budgets and tastes. And a lot of people these days would want to at least own one for the sake of having such a rare stone in their possession.