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Know Your Diamond

Every diamond is a miracle of time and place and chance. Like snowflakes, no two are exactly alike.

Until the middle of the twentieth century, there was no agreed-upon standard by which diamonds could be judged. GIA created the first, and now globally accepted standard for describing diamonds: Color, Clarity, Cut, and Carat Weight. Today, the 4Cs of Diamond Quality is the universal method for assessing the quality of any diamond, anywhere in the world.

The creation of the Diamond 4Cs meant two very important things: diamond quality could be communicated in a universal language, and diamond customers could now know exactly what they were about to purchase.

The 4 C’s - Cut

The cut of a diamond refers to its proportions. Diamonds are usually cut with 58 facets, according to a mathematical formula. This cut is designed to maximize the amount of light reflected through the diamond and to increase its beauty.

Grading a diamond’s cut consists in observing its dimensions and the quality of the make and finish. The characteristics of the cut (table diameter, the crown height, the girdle thickness and the pavilion depth) apply to all shapes.

Round, oval, princess, marquise, pear, radiant, emerald cut and heart shape are the most common shapes.


The round brilliant cut diamond is by far, the most popular and most researched diamond shape available today.

To maximize the brilliance of a traditional round diamond, select one in the two highest cut grades, ideal or excellent, and choose ideal, excellent, or polish and symmetry grades.


An oval diamond has beautiful brilliance that's similar to a round diamond. Oval diamonds are also very popular as their length can accentuate long, slender fingers.

For the most traditional oval diamonds, look for length-to-width ratios between 1.33 and 1.66.


This is our most popular non-round diamond. Here are length-to-width ratios for princess-cut diamond shapes that are pleasing to the eye. For a princess diamond shape that is square, look for length-to-width ratios between 1 and 1.05


The shape of a marquise diamond can maximize carat weight, giving you a much larger-looking diamond. For the most traditional marquise-cut diamonds, look for length-to-width ratios between 1.75 and 2.25


This brilliant-cut diamond is also called a teardrop for its single point and rounded end. The unique look of the pear shape helps make it a popular choice for a variety of diamond jewelry. For the most traditional pear-shaped diamond, look for a length-to-width ratio between 1.45 and 1.75.


Trimmed corners are the signature of this diamond, and they help make the radiant-cut a popular and versatile choice for jewelry. A radiant-cut looks equally beautiful set with either baguette or round side-diamonds. For a radiant diamond shape that is square, look for length-to-width ratios between 1 and 1.05. If you prefer more of a rectangular shape, look for length-to-width ratios greater than 1.10.


What makes this shape different is its pavilion, which is cut with rectangular facets to create a unique optical appearance. Due to its larger, open table, this shape highlights the clarity of a diamond. For the classic emerald-cut shape, look for a length-to-width ratio between 1.30 and 1.40.


The heart is the ultimate symbol of love. The unique look of the heart-shaped diamond helps make it a distinctive choice for a variety of diamond jewelry. For a more traditional heart-shaped diamond, look for length-to-width ratios between .90 and 1.10.

The 4 C’s – Carat

Diamonds weight is measured in carats and can range from below 0.01cts all the way up to hundreds of carats, and has a major impact on pricing, along with the other 3 C’s.

MM-Sieve size chart is as below:-

1.0 carat = 0, 200 grams

The 4 C’s – Color

The best color is no color, i.e. when diamonds allow light to be reflected as a rainbow of color. The absolute finest colorless stone carries a D rating, descending each letter of the alphabet to Z designating a diamond of light yellow, brown or gray. It is very difficult, even for experts, unless under ideal laboratory conditions, to discern one single color grade.

Some diamonds also have a natural color (pink, blue, green, red or others). They are very rare and are referred to as fancies. Colors are evaluated under a different set of standards: fancy light, fancy, fancy intense and fancy vivid. Fancy vivid diamonds are the most expensive because of their extreme rarity.

The 4 C’s – Clarity

Clarities range from Flawless to varying degrees of inclusions. Clarity indicates the presence or absence of inclusions and is graded on a scale from internally flawless to I (I1, I2, I3 etc.). Grading of clarity is based on size, location & number of inclusions. The clarity scale use commercially is:-

Flawless (FL):- No inclusions or blemishes are visible to a skilled grader using 10× magnification

Internally Flawless (IF):- No inclusions and only blemishes are visible to a skilled grader using 10× magnification

Very, Very Slightly Included (VVS1 and VVS2):- Inclusions are difficult for a skilled grader to see under 10× magnification

Very Slightly Included (VS1 and VS2):- Inclusions are minor and range from difficult to somewhat easy for a skilled grader to see under 10x magnification

Slightly Included (SI1 and SI2):- Inclusions are noticeable to a skilled grader under 10x magnification

Included (I1, I2, and I3):- Inclusions are obvious under 10× magnification and may affect transparency and brilliance


A certificate records all the relevant information of a specific diamond, including carat weight, color grade, clarity grade, measurements, and physical properties, as well as plotting diagrams showing the inclusions.

Certificates are issued by recognized gemological laboratories. Among the most well-known are the GIA (Gemological Institute of America), the IGI (International Gemological Institute), and the HRD (High Diamond Council – Hoge Raad Voor Diamant).

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