Education

Diamond Shapes

By 17.04 September 20th, 2018 No Comments

EDUCATION

BUYING GUIDES

The purchase of a diamond creates an important decision in life –diamonds can be bought as an investment or as a gift to celebrate a special occasion, and often a diamond is the first choice for an engagement ring. Classic diamonds are still the favourite choice of stone, so when considering a purchase it is imperative that you learn how to choose the perfect diamond.

Careful research should be done before purchasing this valuable gem as there are various features that need to be looked at first. These are the Four Cs which categorise and grade the different types of diamonds, making each diamond unique: CutColorClarity and Carat. The integration of the Four Cs defines the Language of Diamonds. Learn the language before making a choice!

Diamonds are cut in various ways which describe the proportion and finish of the diamond, the cut being the most complicated facet in the process of taking a rough diamond to the perfect end product specimen. Certain factors which are affected by the type of cut will enhance the brilliance, scintillation and dispersion within the stone. Brilliance is the light that is reflected off a diamond; Scintillation shows the colors as the diamond is moved in different directions; Dispersion results from the separation of some light rays into color flashes as light moves through the stone. The two references to ‘cut’ are firstly the shape and then the quality, determined by proportion, precise symmetry and the smooth, polished finish.

When purchasing a diamond according to your budget, all Four Cs must be in balance, and the price will rise exponentially with carat weight (one carat of 100 points weighs 0.2 grams).

Primarily the first choice to make from the Four Cs would be the cut or shape. The various cuts, all of which are different from the others, display specific characteristics which determine the quality of the specific shape. Diamond cutters use behaviour of light theories, as well as accurate mathematical calculations, in order to optimise the brilliance, scintillation and dispersion of each and every diamond. The quality of a cut depends on human decision and the diamond cutter’s skills taken in this process. Cut grades are defined in laboratory reports by using the GIA standards of Excellent, Very Good, Good, Fair and Poor.

The Round Cut Diamond, also known as a Brilliant Cut Diamond, is the most popular cut and has more brilliance and scintillation than other shapes, as well as having ideal proportions, angles and symmetry. The Round Cut remains fashionable, while many of the other shapes tend to more trend–related. Its cone shape has 58 facets, 33 on the crown and 25 on the pavilion. These complement each other and allow the maximum light to move through the diamond.

Princess Cut Diamonds are often favoured for engagement rings as the cut is clear, being traditionally square in shape or rectangular if the length to width ratio is altered. This design allows for excellent top brilliance appearing rather exotic and thus perfect for an engagement ring. The shape allows for minor flaws but when being set the four pointed corners must be well protected.

Regarding ‘fancy-cut’ diamonds, clarity and color are qualities that should be good as imperfections are more evident.

Emerald Cut Diamonds have rectangular facets which create an optical appearance of great beauty and precision, unique to this particular cut.  The clarity need to be of a high grade as this cut lacks the brilliance of triangular and kite-shaped facets. This step-cut was originally only used on emeralds, hence the name.

Radiant Cut Diamonds have a signature of trimmed corners and a variation in the rectangular shape of length to width ratios. It is a combination of the styles of the Round Cut and the Emerald Cut creating a different yet brilliant diamond.

Pear Shaped Diamond Cut has 58 facets and is a combination of the traditional Round or Brilliant Cut into a pear shape. It has brilliance as in a Round Cut stone but its shape is subjective with regard to proportions. It can be very impressive as light ‘dances’ in this shape.

 

Cushion Cut Diamonds, also known as Pillow Cut Diamonds, have an antique cut which has been popular for over a century.  This classic shape, with a romantic appeal, varies from square to rectangular with the clarity being good because of the large facets. The rounded corners and facets, of which there are 58, serve to increase the brilliance.

Marquise Cut Diamond is a classic cut where the cutter maximises the carat weight by cutting the stone into a boat shape which gives a much larger looking diamond. The cutting process is Cushion Cut Diamonds, also known as Pillow Cut Diamonds, have an antique cut which has been popular for over a century.  This classic shape, with a romantic appeal, varies from square to rectangular with the clarity being good because of the large facets. The rounded corners and facets, of which there are 58, serve to increase the brilliance.

The Marquise Cut Diamond is a classic cut where the cutter maximises the carat weight by cutting the stone into a boat shape which gives a much larger looking diamond. The cutting process is similar to that of a Round Diamond enabling the cutter to cut out inclusions while keeping the stone as brilliant as possible. The length of this shape makes fingers look more slender!

Emerald Cut Diamonds have rectangular facets which create an optical appearance of great beauty and precision, unique to this particular cut.  The clarity needs to be of a high grade as this cut lacks the brilliance of triangular and kite-shaped facets. This step-cut was originally only used on emeralds, hence the name.

Radiant Cut Diamonds have a signature of trimmed corners and a variation in the rectangular shape of length to width ratios. It is a combination of the styles of the Round Cut and the Emerald Cut, creating a different yet brilliant diamond.

Pear Shaped Diamond Cut has 58 facets and is a combination of the traditional Round or Brilliant Cut into a pear shape. It has brilliance as in a Round Cut stone but its shape is subjective with regard to proportions. It can be very impressive as light ‘dances’ in this shape.

Regarding ‘Fancy-cut’ diamonds such as Asscher and Heart, clarity and color are qualities that should be good as imperfections are more evident.

 

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