One of the first things most people learn about diamonds is that not all diamonds are created equal. In fact, every diamond is unique. Diamonds come in many sizes, shapes, colours, and with various internal characteristics.

All polished diamonds are valuable. That value is based on a combination of factors. Rarity is one of those factors. Diamonds with certain qualities are rarer—and more valuable—than diamonds that lack them. Jewellery professionals use a systematic way to evaluate and discuss these factors. Otherwise, there would be no way to compare one diamond to another.

And there would be no way to evaluate and discuss the qualities of an individual diamond. Diamond professionals use the grading system developed by GIA in the 1950s, which established the use of four important factors to describe and classify diamonds: Clarity, Colour, Cut, and Carat Weight. These are known as the 4Cs. When used together, they describe the quality of a finished diamond. The value of a finished diamond is based on this combination.


The carat weight of a diamond is measured by a different set of scales. A carat equals 100 points or a fifth 1/5 of a gram. A higher carat weight diamond is far more valuable due to the rarity of the its natural occurrence. In saying that, diamonds of equal carat weight do not imply a similar value. You simply cannot value a diamond without all the other combining factors, making the perfect diamond so unique, beautiful and rare.



Diamonds are transparent however depending on the grade, you can see a slight hint of colour. The colour of a Diamond is evaluated by an alphabet scale from D to Z. This is an international colour grading system that has been used since the 1950s. If you are looking for high quality diamonds we strongly suggest the D, E and F as these are all graded colourless. It’s the rarest and the most valuable diamonds you can buy.



From the naked eye most diamonds seem to look perfect and seem to sparkle well. However, when you view a diamond under a 10x magnification, many imperfections tend to surface. These include tiny crystals, clouds / feathers. The clarity of a diamond highly depends on its internal characteristics making the more perfect diamonds even harder to find. The rarest of them all are Flawless (FL) diamonds or Internally Flawless (IF) and can only be graded by a gemologist. Simply put, these imperfections will determine the overall “clarity” and “value” of the stone even if you can’t see a noticeable difference. The international grading system is shown in the chart below. At LotusJewels we take pride in finding rare and valuable diamonds that have no inclusions that are visible to the naked eye.



The art of making any diamond sparkle comes down to how it was cut and to judge a well cut diamond you must gauge its proportion, symmetry and polish. A master cutter is able to release a diamonds sheer beauty and brilliance from the technique and method they use. When you cut a diamond it has to be just right, neither too deep nor to shallow. When light passes through the stone, its bounced from one mirror like facet to another and finally reappears to the eye in a wonderful beam of spectral colours. To achieve such beauty requires the sacrifice of the rough diamond’s weight.



Fluorescence is a natural characteristic and can be observed in most gem grading’s. A Diamonds fluorescence is measured when exposed to ultraviolet light. The reaction is than visible using a UV lamp however, some stones have such a strong fluorescence it can be seen in sunlight. The grading is usually classified as None, Faint, Medium, Strong or Very Strong followed by the colour. Blue is the most common fluorescence colour followed by yellow, white, green and some rare instances rend and orange. At LotusJewels we only accept diamonds with zero to faint fluorescence.