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How to choose a perfect Diamond?

Loose Diamond Proportion


Polish quality refers to the overall craftsmanship of the finished diamond. Which includes sharp edges and smooth and flat facets. Polishing wheel marks should not be visible without magnification. Polishing can be performed at any time but is usually done after a diamond is cut.


Symmetrical diamonds are graded on the degree of perfection in their cut and facets. Gemologists use optical and chemical analysis of these diamonds to grade how perfectly each facet of the diamond is aligned. Though most round diamonds are considered as equal, because of their larger size.


Fluorescence is the result of a diamond absorbing radiation from ultraviolet light and then re-emitting it at wavelengths that are visible to the eye. The intensity of fluorescence can vary depending on the type of gemstone, but only around 30% of diamonds have any sort of fluorescence.


This page is specifically designed to educate the buyers about loose diamonds so that they can select the diamond for engraving in their ring. Here, diamond proportion is an important feature to consider while buying diamond. Radiant, dispersal, and specular reflection are three distinct attributes that well-cut diamonds exhibit. Firstly, when light enters a diamond’s surface, it will either penetrate the stone or reflect off its polished table. Secondly, the flash of white light one gets while staring at a stone is the diamond’s brilliance, which is the light that is reflected. Lastly, some light beams split up into bursts of colour as they pass through a stone, a phenomenon known as scattering.

The GIA polish grades for loose diamonds are as follows:

Firstly, fire is the product of dispersion, which is the division of white light into its spectrum hues. Secondly, scintillation is the phenomenon of colour flashes that can be seen when a diamond is moved back and forth by the viewer and it is called Dispersion. Thirdly, grades for diamond polish are determined by how smoothly each facet is cut. Lastly, to evaluate the diamond’s polish grade, a gemologist examines it under magnification. Therefore, we advise purchasing diamonds with polish ratings of Excellent, Very Good, or Good. However, poor and fair polish diamonds won’t reflect light as well and could seem dull.

All diamonds fluoresce, right?

Contrary to all myths but sadly diamonds don’t all glow. Therefore, the grading report will indicate the diamond’s fluorescence as either inert or none, if it does not fluoresce.

What Kinds of Diamond Fluorescence Are All there? 

Fluorescence intensity ranges from faint to medium to strong to extremely strong. Specifically, faint refers to a faint glow that is challenging to discern under UV light, while very strong refers to how intensely and clearly the diamond glows when exposed to UV light. In addition, although blue is the most typical hue, fluorescence may also come in other colours. It’s worth noting that a fluorescent diamond may also display the hues yellow, green, and white.

Shapes of Loose Diamonds

Loose Diamonds come in different shapes that are discussed as follows:

  • Princess

  • Marquise

  • Pear

  • Asscher

  • Heart

  • Oval

  • Cushion

  • Radiant

  • Round

  • Emerald

The emerald cut is a style of diamond cut that is characterized by its rectangular shape with cropped corners and a flat table. It is named after the classic shape of emerald gemstones, which also typically feature rectangular facets. The emerald cut is a step cut, which means that its facets are arranged in parallel lines that resemble a staircase. This creates a series of broad, flat planes that reflect light differently than the facets of a brilliant cut diamond, which tend to create more sparkle and fire.

A “traditional” design for diamond engagement rings is the Marquise-Cut Diamond, a dazzling stone with a boat-like shape. However, when it comes to this particular style of cut, color scheme and brilliance are the two most crucial attributes, as they are in all “fancy cut” diamonds. Somehow, the Marquise-Cut Diamond is cut similar to a Round Brilliant Diamond, but the diamond cutter lengthens the gemstone into its distinctive “boat-shape” to enhance the diamond’s carat weight. Whereas, this approach permits them to eradicate each imperfection while conserving the bulk of the beautiful diamond.

The Pear Shaped Diamond is an uncommon diamond that may nevertheless make light “dance” as it does in the classic Round Brilliant Cut by fusing the history and brilliance of a round cut with a less typical form. However, given that its size and proportions are essentially a matter of personal preference, it is arguably the most debatable diamond form. Interestingly, the diamond typically has 58 facets, which allows light to travel through it in a manner similar to that of a Round diamond. Nonetheless, it stands out more due to its uncommon form, which adds a unique touch to any piece of jewelry.

The step-cut Asscher Cut Diamond, commonly known as a “Square Emerald-Cut,” has cropped corners and is created following this method. Interestingly, an Asscher Cut Diamond first seems practically octagonal due to the chopped corners. However, they have a clean, sparkly, and brilliant look that distinguishes them from other diamond cuts. Additionally, they have the same purity of glacier-water ice as Emerald-Cut Diamonds, which allows you to look completely through the stone. However, it's worth noting that it is crucial to get an Asscher Cut Diamond that is perfect or as near to flawless as possible because inclusions are visible to the human eye in Asscher Cut Diamonds.

The top of the heart-shaped diamond has a split, and it glows magnificently. Undeniably, among the diamond forms, it is one of the most romantic, making it a popular choice for engagement rings and other sentimental jewelry. However, choosing a diamond with a heart shape requires careful consideration of its proportions and symmetry. Since two sides of the heart have to be identical, harmony is fundamental when picking a diamond with a heart shape. The two lobes should be well divided, and the wings should be rounded to achieve a symmetrical look. Interestingly, less than .50 carat heart-shaped diamonds are often not a wise choice because they have a smaller appearance than other diamond shapes, particularly when prong-set. Nevertheless, small heart-shaped diamonds work well in bezel and three-prong settings, making them an excellent choice for certain types of jewelry.

The most common cut, the Round Brilliant, has been tweaked to create the Oval Cut Diamond, which is an excellent alternative for those seeking something unique yet comparable in quality to the Round “Ideal” Cut. The Oval Cut Diamond retains the round cut's brilliance and sparkle while presenting a different shape. Interestingly, it is the ideal option for purchasers who desire qualities comparable to those of the Round “Ideal” Cut but would like something in a more unique shape. Additionally, the oval shape of the diamond gives the illusion of length, which can beautifully lengthen fingers when worn as a ring.

The antique cushion cut diamond has a timeless, romantic charm, making it a popular choice among diamond enthusiasts. This cut is regarded as a hybrid between a contemporary oval-cut diamond and the Old Mine Cut, which gained popularity in the mid-19th century. Unlike modern cuts, the Old Mine Cut had broad facets and rounded edges, which were created to capture the splendor of candlelight. With 58 facets, the Cushion-Cut Diamond carries forward the essence of the Old Mine Cut while incorporating the modern features of diamond cutting.

To create a unique diamond cut, Henry Grossbard combined the more traditional Round Cut with the more modern square or rectangular shape to create the Radiant Cut Diamond. This cut blends the techniques of the Round Cut and Emerald Cut diamonds to create a new and beautiful diamond. The goal was to preserve the beauty of each type of diamond while also creating something that had never been seen before on the market. The result was the creation of the Radiant Cut Diamond in 1977, which is truly one-of-a-kind.

The most popular and timeless diamond shape is the Round Cut Diamond. With its characteristic circular outline and 58 precisely placed facets, also called a "brilliant" cut, it maximizes the stone's sparkle and brilliance. Furthermore, this cut accounts for more than 75% of all diamonds sold today, making it the most common diamond shape on the market.

How to Select 
Perfect Loose Diamonds?

Ideal Cut Diamonds

The cut also describes how well the diamond reflects light to the viewer’s eye. In addition to describing the diamond’s form, hue or clarity, a well-cut diamond can appear highly dazzling and flaming. Whereas, a badly cut diamond will look dull and lifeless. However, these seem bigger than other diamonds of the same carat weight, well-cut diamonds also appear more dazzling. More Importantly, an “ideal” diamond has more brightness and diameter than deeper-cut diamonds.

Select Diamond Colour

It is often advised to select a diamond with the least bit of hue while looking for one. Generally, five major types of diamond color are distinguished on a scale from D to Z (colorless, near colorless, faint, very light, and light). Normally, diamonds exist in every hue imaginable. However, a diamond’s main hue is yellow, which is brought on by the trace element nitrogen. 

  • Colourless Diamond (D, E and F)
  • Near Colourless Diamond (G-J)
  • Faint Colour Diamonds (K)

How to decide clarity grade?

The carat weight of a diamond determines how big it is. Furthermore, up to two thirds of the total carat weight may be lost when raw diamonds are cut and polished into finished diamonds. Therefore, a single two carat diamond will cost more than two one-carat diamonds of the same grade because larger rough stones of good quality are harder to find than smaller rough gems of high quality. The majority of diamonds used in jewelry and sold as loose stones in the United States weigh one carat or less. In addition, less than half a carat is the typical weight of an engagement ring diamond offered in the United States. Lastly, a diamond’s weight will rise considerably more quickly than its actual “face-up” diameter.

Which Carat Weight is Right For You?

It’s crucial to choose a diamond free of any impurities that might diminish its all-around beauty and durability. We suggest you to stick with diamonds rated “VS2” or higher if you want to be certain that your diamond will be free of all “eye-visible” imperfections. Specially, shopping SI grade diamonds may be highly satisfying, but it’s better to have Nivetta’s knowledgeable personnel examine those stones before placing your order. Because this will guarantee that the diamond you get has no inclusions that can be seen with the unaided eye.

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