After a cold and rainy winter, Spring is finally here. With vibrant flowers and (occasional) sunshine, April is the brightest month of all with the diamond birthstone.

The most highly prized of all gems, diamonds can be found in a rainbow of colours. With colourless the rarest and most valuable, it can also be found in hues ranging from yellow, green and blue to brown, red and black.

It is the hardest of all minerals, renowned for its brilliance and beauty, yet is the simplest form of mineral (crystallized carbon). According to Greek history, diamonds were splinters of stars falling to the earth, and cupid’s arrows were said to be tipped with diamonds.

Ancient Egyptians believed that you should wear your diamond on the third finger of your left hand, which contains the ‘vena amoris’, the vein of love, flowing directly to the heart. The combination of strength, durability, sparkle and lustre creates the perfect marriage for a ring that can be worn every day.

Buying a diamond, in any form, should be based on the right knowledge. They come in many qualities, shapes, sizes and colours. Therefore, The Four C’s were introduced to grade a diamond by its clarity, colour, carat and cut.


The colour is a very important aspect of the diamond and plays a crucial role when discussing the value of a diamond. The less colour a diamond has, the more sparkle and light there will be from the diamond.

D and E colour diamonds are exceptional and are the most rare and desirable diamonds because they are graded as ‘colourless’. F and G are classed as ‘Rare White’, H is classed as ‘White/near colourless’, I and J are graded as ‘Slightly Tinted White’, K and L are classed as ‘tinted white/faint yellow’ and M through to Z are ‘Tinted/light yellow’.


There are diamonds that are made with flaws, and some that are not, and each of these is given a clarity grading by the GIA. Due to the growing conditions and the nature of diamonds, it is expected that some diamonds come with flaws and ‘imperfections’. These imperfections can be called ‘Inclusions’ meaning internal objects, and ‘blemishes’ meaning external marks. A diamond with less inclusions means there will be more light coming through the stone.


When talking about the cut of a diamond, it is referring to the stones finish and proportions, and it is the only one of the 4 C’s that is directly influenced by hand.

One of the first steps in a diamonds journey is it being dug out from the mine. When they are dug out they are in their roughest form, having no specific shape… until it reaches the cutting stage and is transformed into a sleek shape.

The word cut can also refer to ‘shape’, (meaning the face-on appearance of the gem) and the cutting style (the arrangement of the facets on the gem). The idea of the ‘cut’ is to make sure that it can produce light.

When a light is produced, there are three magnificent and important diamond attributes:

Brilliance – the total light reflected from a diamond

Fire – the dispersion of light into the colours of the spectrum

Scintillation – the flashes of light, or sparkle, when a diamond is moved.


When it comes to a diamond, the carat is a unit of weight, not size. To know the weight of a diamond accurately, it has to be weighed prior to its setting. The weight of a diamond is described in terms of the carat which equates to 0.2 grams.

One carat is divided into one hundred points, so a half-carat diamond equates to fifty points. It represents the size of a diamond as a whole.

Carat weight is the most obvious factor in determining the value of a diamond, however two stones of equal size can have different values dependent on the other C’s.

Visit Rudells to find that perfect diamond or discover our collection online.