The cut of a diamond not only refers to the diamond’s shape, it also refers to how effectively the diamond returns light back to the viewer’s eye. A well-cut diamond will appear very brilliant and fiery, while a poorly cut diamond can appear dark and lifeless, regardless of its colour or clarity.
Not only do well-cut diamonds appear more brilliant, they also tend to appear larger than other diamonds of the same carat weight. An "ideal" diamond has both increased brilliance and diameter relative to more deeply-cut diamonds.
White or colourless diamonds exist on a scale of many different shades, ranging from brilliant white to pale yellow. These subtle differences are graded on a colour scale from D (colourless) to Z (light yellow). Beautiful coloured diamonds, in hues of yellow, pink, blue, orange, green and red, for example, go beyond all other measures of rarity, and a graded based on their intensity and enticing depth of colour.
Which Clarity Grade to Choose?
If you want to be 100% sure that your diamond will be completely clean of "eye-visible" inclusions, stick with diamonds graded "VS2" or higher. Shopping for SI quality diamonds can be very rewarding, but it's best to have those diamonds reviewed expert staff before finalizing your order. This will ensure you receive a diamond that does not have any inclusions visible to the naked eye. It is also a good idea to balance the clarity grade of your diamond with the colour If you are looking at diamonds in the D-F colour range, focus on clarity grades of VS2 or higher but if you like to see if you could get more for your money, consider high colour with SI clarity
Carat is a term that refers to the weight of a diamond. Prior to the twentieth century, diamonds were measured using carob seeds, which were small and uniform and served as a perfect counter weight to the diamond. The word "carob” is the origin of the word "carat" that we use today. A diamond will increase in weight much faster than it increases in actual "face-up" diameter. For example, while an ideal cut one-carat diamond measures approximately 6.5mm in width, a diamond of twice its weight measures only 8.2mm wide—less than a 30% increase.
Diamonds come in many different shapes. Each diamond shape possesses its own unique qualities, so exploring and learning about the various shapes is worth your while. Flawless Fine Jewellery offers the highest quality certified diamonds to satisfy all tastes.
While every diamond is unique, all diamonds share certain structural features. A diamond’s anatomy, or its basic structure, determines its proportions, brilliance, dispersion and scintillation. Each part of the diamond has a specific name, and having a basic understanding of how each part contributes to the diamond as a whole will help you find your perfect diamond.
A diamond is comprised of the eight main components. They are Diameter, Table, Crown, Table Spread, Girdle, Pavilion, Depth, and Culet. Below is a brief description of each part of a diamond and its location.
- Diameter: The width of a polished stone, measured from edge to edge.
- Table: The largest polished facet located on the top of the diamond.
- Crown: The top part of a diamond extending from the table to the girdle. The crown is made up of bezel facets (crown mains), star facets, upper girdle facets (upper halves), and a table facet.
- Girdle: The very edge (widest edge) of the diamond where the crown and pavilion meet.
- Pavilion: The bottom part of a diamond extending from the girdle down to the culet.
- Depth: The total height of a diamond measured from the table to the culet.
- Culet: The small or pointed facet at the very bottom of the diamond.
Before purchasing a diamond, make sure that you have a basic understanding of a diamond’s anatomy. This will allow you to truly appreciate diamonds and all their intricacies, communicate with experts about a particular diamond, and, most importantly, it will assist you in making a well-thought out decision about which diamond is best for you.
An ideal cut diamond is a round, brilliant, or princess cut diamond that is cut to ideal proportions and angles and has excellent polish and symmetry ratings. An ideal cut diamond reflects almost all the light that enters it, and is among the rarest cuts. The ideal cut diamond is used as benchmark for grading all other diamonds.
Ideal diamonds are perfectly proportioned to refract light, producing that fire and brilliance up through to the table and crown. There are at least six "ideal cuts" being used today but only three of them (including the one by Tolkowsky ) are the most common.
There are three different criteria used to determine a fancy colour diamond’s colour and intensity
- The diamond’s primary color (i.e. pink)
- The diamond’s secondary color (i.e. purplish)
- The intensity of the diamond’s color (i.e. fancy, fancy intense, fancy vivid)
The primary and secondary colors determine the tone of the diamond’s color. The strength of the colour is defined by its level of intensity. As a general rule of thumb, a fancy color diamond becomes more valuable as the color intensity increases. The classifications for fancy color diamonds are as follows: faint, very light, light, fancy light, fancy, fancy intense, fancy vivid/fancy deep/fancy dark.
A diamond certificate verifies each diamond’s specifications, including its color grade, carat weight, clarity grade and cut grade. You should never buy a diamond without a diamond certificate. The most well-known grading laboratories are the Gemological Institute of America (GIA) and the American Gem Society (AGS) and the International Gemological Institute (IGI).
A diamond's cost depends upon objective characteristics, the 4C's: Color, Clarity, Cut and Carat. The relationship between these four characteristics determines the value of a diamond. Although it is commonly assumed that carat is the most important member of the 4C's, color, cut and clarity have a much greater impact on the appearance of a diamond.